Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc6020e37d63a19…

MALICIOUS

PDF

47.9 KB Created: 2020-08-19 17:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa2feb0f520455d1afb63d36fbccf100 SHA-1: f811621db1b82dfbb28277588ddf06e4ad2a41f4 SHA-256: 5fc6020e37d63a19c5dbf95768a406adb91dfdb017704bc054a4106915b0e62c
154 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.com, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains text related to a user manual and the malicious URL, suggesting a lure for phishing or malware distribution. The presence of numerous Shopify links, while some are benign, is characteristic of SEO link farm techniques used to obscure malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=boult+audio+probass+user+manual
    • http://gobirulaf.gettingreadyfor100.com/uploads/1/3/1/4/131483453/3a396797e93e010.pdf
    • http://files.esposlawenforcement.com/uploads/1/3/0/7/130776255/xazudefanofid-labibagama-zesaku-rujametaliti.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/27049235705.pdf
    • https://cdn.shopify.com/s/files/1/0432/8328/4136/files/brink_anhngerkupplung_abe.pdf
    • https://cdn.shopify.com/s/files/1/0440/3822/6085/files/snoop_dogg_doggystyle_songs.pdf
    • https://cdn.shopify.com/s/files/1/0449/5238/7739/files/construction_contract_termination_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0436/9999/4789/files/timesaver_sander_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/ripisibuniradesagi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4481/3470/files/60638143185.pdf
    • https://cdn.shopify.com/s/files/1/0434/6963/5746/files/nanajejewafotene.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6939/files/attunity_replicate_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9531/files/mitozavazuminopozavowu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2009/0535/files/space_4d_cards.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/sifixuzi.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066eb.bin
fff6f7b0a64b614fa7e388d1801cf35bdc6863d4c6393b676624728b29906c95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66EB 5296 bytes
font_01_sfnt_off000078c3.bin
3f363f7f491ff9137ac3074f237c7c0c87106fdc163684576f58ba0ecf9a7e29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C3 10744 bytes
font_02_sfnt_off00009d9a.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D9A 16164 bytes

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