Malicious PDF — malware analysis report

Static analysis result for SHA-256 da6d1067c21d97ef…

MALICIOUS

PDF

53.5 KB Created: 2020-10-28 10:05:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 09aed7f8ef39382fbf26a56ac746e6f1 SHA-1: ea55f307512b9128ea9ec53f9a41082579e2153d SHA-256: da6d1067c21d97ef32e9dd5f4aeb436d8cf2ae581c4ccb28b3158da765538872
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector URL (https://gettraff.ru/strik?keyword=template+blank+wheel+of+life+pdf). This indicates a link farm designed to manipulate search engine results and lure unsuspecting users. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded URLs and the overall structure suggest an attempt to direct users to malicious infrastructure, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/strik?keyword=template+blank+wheel+of+life+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1362/2936/files/gefidisuwokeriduzimenije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7214/2497/files/free_printable_division_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5636/1379/files/13767721171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3227/5865/files/49245992065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5100/3303/files/43477265169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8906/0551/files/54410129324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5521/0407/files/85998864320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1673/0799/files/job_motivation_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/buwugilabidotikewovoze.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/audre_lorde_the_master_s_tools.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/11084114638.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/nattakurinji_varnam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3e62672-9975-494b-88b8-0f7fc5bcbd2e/21322572535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b0cf695-380e-4681-9dfa-46c342cd399b/gavixomosazekozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5e80bd5-c1d4-40ea-b082-f0b3568bef79/how_to_get_unlimited_money_in_csgo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8da401bd-32b4-4384-9038-94ae723a71ce/rejepuxotubag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee3baec9-88a7-46aa-8d4e-3079aa6a5703/78173239013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6145/6279/files/kh3_kiddie_korral.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7992/1564/files/zikipavexorogikibuxokal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2072/8478/files/wajowanigavebefewotobas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0f8eeee-75ee-4349-95f8-d52a140e558d/3rd_grade_reading_comprehension_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/849c8e0f-6602-4d35-b9ab-9fabc8dc6791/65909882836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abb1e99f-9138-42cc-888b-bee6895a9bca/37611600828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5fd4fb5-1f17-45d5-b68c-a022b0624ec0/14136060933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8c5151-c419-4e57-808c-246fb575609b/500_gallon_preformed_pond_liner.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E6 5040 bytes
SHA-256: b0c43bbbae1a4e85954fe4b6de4400ae5119d1b4c0cf7304a958134d56d4216b
font_01_sfnt_off000092ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92EA 12280 bytes
SHA-256: 98c3004c7cc5531e7f67552f7c4c07e2e3a3a343ecb422511c8311778870d0ce
font_02_sfnt_off0000b9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378