Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d7d5a87f8ac7c92…

MALICIOUS

PDF

116.7 KB Created: 2020-08-11 06:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c38e37a2939d4d406ca0e258c9d3dedb SHA-1: 5af2d81bd27fc2cf10c4bb5b889036291c6d1fcb SHA-256: 6d7d5a87f8ac7c92c69813623aebefa1c1e111f27c8913c7053a1fb6d2e749cf
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The PDF also hosts a large number of external links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness, and the presence of urgency language further supports a phishing or scam attempt.

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.
  • 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://ttraff.cc/pify?keyword=nutricion+parenteral+y+enteral+pdf
    • http://files.professorwillis.com/uploads/1/3/0/9/130969819/3536095.pdf
    • http://files.stephenjonesjewellers.com/uploads/1/3/0/8/130874416/budisazemabizozi.pdf
    • http://files.renatascakes.com/uploads/1/3/1/0/131070374/4bc50e2b.pdf
    • http://files.lillianlanko.com/uploads/1/3/2/8/132815924/4936349.pdf
    • http://files.oceanviewlotuvita.com/uploads/1/3/0/8/130873798/takirare.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/0480/3746/files/99794710943.pdf
    • https://cdn.shopify.com/s/files/1/0435/1492/1114/files/juzulogexutirok.pdf
    • https://cdn.shopify.com/s/files/1/0432/3675/3570/files/guvaxejolurejijo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7677/1233/files/bright_field_and_dark_field_microscopy.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2269/files/naniwetafiforine.pdf
    • https://cdn.shopify.com/s/files/1/0435/3343/5032/files/itunes_country_codes.pdf
    • https://cdn.shopify.com/s/files/1/0438/0301/7378/files/67107164590.pdf
    • https://cdn.shopify.com/s/files/1/0432/6598/2632/files/bisuvufok.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/atari_2600_game_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6995/files/tejuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/3881/8982/files/45811238345.pdf
    • https://cdn.shopify.com/s/files/1/0428/2069/8268/files/43567991357.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/fikixubuxizagekat.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018470.bin
587f9c6c4c14fd177fa45625ce528a048a424d1dec067f87b7f7ade64f73484e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18470 5044 bytes
font_01_sfnt_off000195b3.bin
09670052479e7f7e1bc01023f271c316047446c6ce1758413f620b95f3faf762		 pdf-font-stream PDF embedded font (sfnt) at offset 0x195B3 15364 bytes

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