Malicious PDF — malware analysis report

Static analysis result for SHA-256 c68129908a54e586…

MALICIOUS

PDF

48.2 KB Created: 2020-10-28 05:47:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6c4f6fa0c2ff408d62c4621b43a628b0 SHA-1: 26cad1053ba4db5870d8247c876e771e911b7e12 SHA-256: c68129908a54e586b2163a042bca5e738f4444358a84732a8ba2931317dcb0a6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://gettraff.ru/strik?keyword=fires+of+hell+turkmenistan', which is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=fires+of+hell+turkmenistan 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://uploads.strikinglycdn.com/files/d7714ba4-c48f-499f-96fc-901ba4301f0d/kofijujisefazulitifalojir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d01fefe-415c-4d79-8ca7-38ee9a5a31b1/10141349841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0156f442-75f1-44b2-8aa5-020fa487a80f/42356073312.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/58509966827.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/maxolib.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/ikea_svarta_loft_bed_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/widavekuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce4133a-6089-4257-8151-9c7ceb08d9bb/epitheliaal_myoepitheliaal_carcinoom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c46c410-331e-42a3-826d-391e54c35eae/wosizejeragujivosofofun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fed7c79e-ec4e-4554-8e2a-86d66dc18e5c/algebra_1_rescue_answers_holt_mcdougal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ac97f71-29ec-4978-b695-58b1cc2620a4/43175118466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6444/2521/files/fewetulitorukaduzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/82608105880.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6604/2784/files/wefezalobegawefinoresubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8463/5040/files/zikupumidusirugebisula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5223/5938/files/zezusilafor.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/aviation_weather_services_book.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/90148888088.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/lusudenijewip.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/billy_the_kid_book.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/b_pharmacy_government_colleges_in_maharashtra_list.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_off00006fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAB 4908 bytes
SHA-256: 07bb116e470118f98ea8bbcb2f39ff95033632f9c329a066d9eec4bf9a9f1a91
font_01_sfnt_off0000802a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x802A 10796 bytes
SHA-256: 0cd682e23414e780dd80a3083abf536a2c15d24a140635d3f0fa6ca677bfbd07
font_02_sfnt_off0000a4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4FF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c