Malicious PDF — malware analysis report

Static analysis result for SHA-256 80befb222be9aace…

MALICIOUS

PDF

54.7 KB Created: 2020-08-03 18:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c29125518a9166db5f3d7e07293e55a4 SHA-1: afba1453a42b4e94a45417e5e9585103b3036eff SHA-256: 80befb222be9aace0f7c65c5cba8f6264a853426798a94276b5d993c571474d1
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the same redirector URL and appears to be a lure related to book summaries.

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.ru/pify?keyword=ate%25C5%259Ften+g%25C3%25B6mlek+kitap+%25C3%25B6zeti+pdf
    • http://files.salpiconontario.com/uploads/1/3/2/6/132695397/3367778.pdf
    • http://files.straymongrel.com/uploads/1/3/1/8/131871894/4cc60b638a0f8e.pdf
    • http://files.bathurst75fc.com.au/uploads/1/3/1/4/131438641/dibimati.pdf
    • http://files.audioallure.com/uploads/1/3/0/8/130874085/femuku.pdf
    • http://files.rlasouthbend.com/uploads/1/3/2/7/132740362/tofunumigaweke_lavobixan_sitirisuguj_regizotowe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/0339/3694/files/skyrim_game_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/5805/9674/files/les_centrales_thermiques.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/12550872952.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/konajeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/xidojotutok.pdf
    • https://cdn.shopify.com/s/files/1/0433/9849/6412/files/nefuvumefawuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/7644/2530/files/22661634591.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gifizazuxapi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31052941417.pdf
    • https://cdn.shopify.com/s/files/1/0430/8851/1130/files/xutikikoxir.pdf
    • https://cdn.shopify.com/s/files/1/0436/5356/2526/files/27400955500.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_off000094ba.bin
02dc9884b0ad06f1297cdcefc9488817ac4125a0d0f0b7eb945007bfabe7d83b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94BA 5576 bytes
font_01_sfnt_off0000a76e.bin
a9d635fb926929e99356daa2f7273229652a7bd53f08c2e29d29bd3731d6b4c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA76E 11860 bytes

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