Malicious PDF — malware analysis report

Static analysis result for SHA-256 4055b9c03e772f56…

MALICIOUS

PDF

50.8 KB Created: 2020-08-11 09:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc5113f0ef78a0f09c3e4250c27b593b SHA-1: 182974d23729be1d125e73b981c4046eeb3d708d SHA-256: 4055b9c03e772f56afaeb1f8ffe32e8abf4153c66321d899895e7e49c3d33b83
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, including one to a known malicious redirector at `ttraff.com`. The document body, though partially corrupted, includes text related to 'Samson agonistes summary pdf' and embeds multiple URLs, suggesting a link farm or SEO poisoning tactic to lure victims. The primary malicious URL is `https://ttraff.com/pify?keyword=samson+agonistes+summary+pdf`, which likely leads to further malicious content.

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=samson+agonistes+summary+pdf
    • http://lexipo.bthnm.org/uploads/1/3/1/6/131606552/menaxuwowiwuza_lifuvikupipo_topoguti_vugewekunerani.pdf
    • http://files.sophiawrites.com/uploads/1/3/0/8/130814132/91516ce1884a3.pdf
    • http://files.lillybellaboutique.ca/uploads/1/3/1/3/131398095/d796199d.pdf
    • http://files.rockymountainraconteur.ca/uploads/1/3/0/9/130968981/4454143.pdf
    • https://cdn.shopify.com/s/files/1/0432/6188/6627/files/retagifog.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/2001_jeep_grand_cherokee_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/fapirata.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/90668687632.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/jaribilubofike.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/53172248906.pdf
    • https://cdn.shopify.com/s/files/1/0439/8222/5566/files/35753578323.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/carnatic_music_violin_notes.pdf
    • https://cdn.shopify.com/s/files/1/0429/4452/8550/files/mid_night_club_cheat_codes.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_off0000846c.bin
6f6225c5c9fbd5ed7458fa6bbabc5dfd6ce111a95899fded9e771bc44d14128c
pdf-font-stream PDF embedded font (sfnt) at offset 0x846C 5532 bytes
font_01_sfnt_off0000972c.bin
cb8dbecabc899b63622ff5f8ee91dc21f154869f82427d6b808b87c773a3022a
pdf-font-stream PDF embedded font (sfnt) at offset 0x972C 11760 bytes