Malicious PDF — malware analysis report

Static analysis result for SHA-256 785a970567135401…

MALICIOUS

PDF

40.9 KB Created: 2020-08-13 08:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9b583bbd737e7f0fd37485abaec3242 SHA-1: 6ba1bd2615befba1bb7de88e47cafb0219a8f593 SHA-256: 785a97056713540133492d574c900407df0448824cc9c7da4f1470724078e6d4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and heuristic analysis. It contains a large number of external links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector infrastructure at 'ttraff.cc'. This suggests the document is designed to lure users into clicking malicious links, likely as part of a phishing or scam campaign.

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.cc/wb?keyword=aliran%20filsafat%20pendidikan%20eksistensialisme%20pdf
    • http://zakuzoxaz.thaddeusproduction.com/uploads/1/3/1/1/131164250/giguneku-bemadivuzaku-suzinigedomeli-fifukifedexibu.pdf
    • http://gotupipi.westprairieffa.com/uploads/1/3/1/4/131438477/891d48410a4c7a5.pdf
    • http://files.3lionsfarncombe.com/uploads/1/3/0/9/130969750/8687977.pdf
    • http://files.fatherspride.org/uploads/1/3/1/4/131406736/demix.pdf
    • http://files.dalessandroscouting.com/uploads/1/3/2/6/132680962/favosisejuw-gisex-menot-bedunefisibeg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/4094/8892/files/9596034559.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8209/files/64951586479.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7980/files/c_c_management_application.pdf
    • https://cdn.shopify.com/s/files/1/0431/0728/7189/files/gawedofemapikazuluriva.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/62273147688.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/beowulf_translation.pdf
    • https://cdn.shopify.com/s/files/1/0437/2247/3624/files/81965585742.pdf
    • https://cdn.shopify.com/s/files/1/0445/4989/8399/files/drugi_svjetski_rat.pdf
    • https://cdn.shopify.com/s/files/1/0434/2166/3397/files/java_tutorial_for_selenium.pdf
    • https://cdn.shopify.com/s/files/1/0439/4686/8891/files/jaludipetolejikadefu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/dawulivuwudanotalawuw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005557.bin
bed351f45857fae1f39c93c8bb84a2e75189843bd2317dbbdfc1f3b6f0b3cbca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5557 4920 bytes
font_01_sfnt_off000065e7.bin
11f9e19d89fc48e95852b752155a45ad350e7eeba743b58596cf80ccbfcced9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E7 10120 bytes
font_02_sfnt_off00008837.bin
8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8837 4324 bytes

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