Malicious PDF — malware analysis report

Static analysis result for SHA-256 83fc6c0864ed0050…

MALICIOUS

PDF

48.8 KB Created: 2020-10-25 17:05:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7839a70723e53a8107aebb1a38e9054e SHA-1: 289353a6ead7396205a0fd808e25aaa6407295a9 SHA-256: 83fc6c0864ed005023f252114341cecc65b9824d3f472320718812b1d4675f9c
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ggtraff.ru/123?keyword=commercial+awareness+skills+pdf'. This URL is presented as a download for "commercial awareness skills pdf", indicating a phishing or malware distribution lure. The presence of many external PDF links suggests an attempt to create a link farm or distribute further malicious content.

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://ggtraff.ru/123?keyword=commercial+awareness+skills+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/1/0501/9238/4175/files/fowixulasexifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5511/9520/files/7713819866.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6875/1523/files/lunewinasetopaxajoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/5335/6485/files/honda_foreman_400_manual_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9576/2096/files/4594863717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75abc7a7-c1f6-4a48-b4ce-4e2823981c42/jogolisemib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fdc4901-b3e6-44c2-bd88-53f8e6b02da6/83852301121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c92c69fe-7172-453c-b05d-8d8994b629af/business_essentials_11th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8763/5644/files/happier_easy_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2729/1048/files/zen_y_autocontrol_taisen_deshimaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0752/7077/files/ganixozilijovomupupawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1917/2002/files/monster_park_mod_apk_revdl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/185ba742-e9c5-45f0-a8f2-af8d282bb3fd/66906074896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/185f021d-8f7c-4711-a6c9-d339604a0728/cross_cutting_editing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01994394-7ec0-47b7-a526-a2bb57b8079d/inch_to_decimal_feet_conversion_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e94a2d7a-f340-4f2d-a42c-9837b1ff8473/54206645111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28b422b0-82dc-4ae1-b184-3feb62710b2f/67118204072.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/der_blechtrommel.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/cesspool_design.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/raxekonotelixeni.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_off000071d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D1 5188 bytes
SHA-256: c3e5d250d36580b967e3b16b613a54e07ca9d6bc7a10f3c0cda4e2c0c24583ef
font_01_sfnt_off00008360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8360 10656 bytes
SHA-256: a90f8b37482f7a27a18684c1d6d5042f9074e65085be0f55fbd620ead844da76
font_02_sfnt_off0000a79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA79F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e