Malicious PDF — malware analysis report

Static analysis result for SHA-256 69daef7acf8eaaa6…

MALICIOUS

PDF

65.8 KB Created: 2020-08-10 20:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be58d5ea381f0a51fbb04903474fe63d SHA-1: a1f3dd1bc3bc79ca2ce1745f13d72b82e940c1fb SHA-256: 69daef7acf8eaaa623772857400064f6069b6612ab6e4077ca703d99d0fcae47
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to what appears to be a link farm designed for SEO manipulation. One prominent link, 'https://ttraff.com/pify?keyword=boardman+22+function+bike+computer+instructions+pdf', redirects to malicious infrastructure, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to bike computer instructions and the malicious URL, reinforcing the lure.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=boardman+22+function+bike+computer+instructions+pdf
    • http://lepib.pastorguy.org/uploads/1/3/0/9/130969723/4f1bced57573.pdf
    • http://files.promarstapleandnail.com/uploads/1/3/1/0/131070983/2cec0b.pdf
    • http://kidukipi.tsacurlingclub.com/uploads/1/3/1/8/131855997/7445240.pdf
    • http://files.wiesbadenbaptist.com/uploads/1/3/1/4/131452961/vobiduforu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/wivetizaziw.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/idsa_bacterial_meningitis_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/3740/8936/files/39906111363.pdf
    • https://cdn.shopify.com/s/files/1/0433/9499/0243/files/15411691258.pdf
    • https://cdn.shopify.com/s/files/1/0434/9617/7816/files/blade_and_soul_black_ram_insignia.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/gabugizoxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/88446405346.pdf
    • https://cdn.shopify.com/s/files/1/0447/7770/1533/files/3524920340.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0023/files/nellly_furtado_all_good_things.pdf
    • https://cdn.shopify.com/s/files/1/0447/1370/5625/files/chemistry_notes_for_neet_exam.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8458/files/tactics_for_toeic_listening_and_reading_oxford.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/xagoluvemumofekubuvu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7816/3363/files/arbol_de_decisiones_ejercicios_resueltos.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_off0000a129.bin
6770adae3794dacc89ccdaf9cfe765b9dfc035289cd969d05477568273523fa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA129 5652 bytes
font_01_sfnt_off0000b44e.bin
a122be409b951423fc17363607336c726351b34698ceb0238cb2be007eba457a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB44E 15660 bytes
font_02_sfnt_off0000e4f7.bin
2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 16060 bytes

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