Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3995e2c26dc50dd…

MALICIOUS

PDF

42.9 KB Created: 2020-08-17 18:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 016e4547fc6fe9d58d4ccb6a2389474b SHA-1: 81e733d9bec19332cfc22589e4f14e581d0913a9 SHA-256: b3995e2c26dc50ddad78b41f5a519f3a80a9531e66894bd529c16ff2832b6771
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent link to 'ttraff.com' which is flagged as a malicious redirector. The document body also contains the text 'Purble place game free no', suggesting a lure to entice users to click the malicious link. The PDF also hosts a large number of other links, many pointing to Shopify domains, which is characteristic of a link farm used for SEO poisoning or distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ttraff.com/pify?keyword=purble+place+game+free+no
    • http://files.richmenlooks.com/uploads/1/3/1/3/131379639/a6e4c.pdf
    • http://files.ktventertainment.com/uploads/1/3/1/8/131856392/4607782.pdf
    • https://cdn.shopify.com/s/files/1/0430/2327/0042/files/wasepuxafulosajadopuvidi.pdf
    • https://cdn.shopify.com/s/files/1/0441/3738/2040/files/labels_6_per_page_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/the_beggar_s_opera_john_gay.pdf
    • https://cdn.shopify.com/s/files/1/0438/6412/9696/files/fidibusosifujudinavomumur.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/microeconomics_chapter_12_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6230/files/50930682073.pdf
    • https://cdn.shopify.com/s/files/1/0431/7236/4437/files/tigixas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99914628395.pdf
    • https://cdn.shopify.com/s/files/1/0433/6032/1691/files/14340842879.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4602/files/vw_thing_part.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/93597014027.pdf
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/3d_alphabet_template_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b14.bin
11f59d99fe99241d76b411e0af3a0fe7b6eb0c76e81b2148d0c66a00cd99b080		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B14 5296 bytes
font_01_sfnt_off00007d03.bin
932587abd5f5fecfa354d652fb6a8294dcfc8477b460ed76f32eb9cfaea82b2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D03 9932 bytes

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