Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e641680f24bc5c5…

MALICIOUS

PDF

138.4 KB Created: 2020-08-03 05:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08ca0a832447536878cf604ae558a77f SHA-1: a920f78ab4af264991c84ed90c892a41d27807e8 SHA-256: 7e641680f24bc5c58ae38d647a365b250560274b2fac4e22a03a97d95ac318b9
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating that many of these links point to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=%25D0%25B8%25D0%25B3%25D1%2580%25D0%25B0%25D1%2582%25D1%258C+%25D0%25B2+%25D0%25BF%25D0%25B0%25D1%2581%25D1%258C%25D1%258F%25D0%25BD%25D1%2581+%25D0%25BF%25D0%25B0%25D1%2583%25D0%25BA', which is likely used to obscure the ultimate destination of the attack. While many other links point to benign Shopify domains, the presence of the redirector and the ML classification strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/pify?keyword=%25D0%25B8%25D0%25B3%25D1%2580%25D0%25B0%25D1%2582%25D1%258C+%25D0%25B2+%25D0%25BF%25D0%25B0%25D1%2581%25D1%258C%25D1%258F%25D0%25BD%25D1%2581+%25D0%25BF%25D0%25B0%25D1%2583%25D0%25BA
    • http://files.atlanticcoastproductions.com/uploads/1/3/0/8/130813710/wemovererobeg_rukokitejotemer_kanamivezireg_dinuwutap.pdf
    • http://files.michaeljacksonsoulwarrior.com/uploads/1/3/0/8/130814208/kaxojexijutepu.pdf
    • http://files.vibrationsforlife.com/uploads/1/3/0/8/130874598/8725459.pdf
    • http://files.cagaragedoorrepair.com/uploads/1/3/1/4/131406507/piluxajogigow-kewafatabot-nepugaja-wewuki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3575/files/nuzifofexupufusoviwomip.pdf
    • https://cdn.shopify.com/s/files/1/0431/3484/5079/files/zelibagefakevufexipik.pdf
    • https://cdn.shopify.com/s/files/1/0435/2140/9184/files/lujovatovomuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9310/files/33073353275.pdf
    • https://cdn.shopify.com/s/files/1/0437/7418/1537/files/rimedigijuva.pdf
    • https://cdn.shopify.com/s/files/1/0436/2177/7570/files/logigokuvabafenuzegoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/kotedaxukejexadozotudox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pedarivorenali.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/mijama.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4326/files/hardened_spring_wow.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c830.bin
3290d7fcd24f5185a0c97d318bd3a99a25a49fe4ad182950d5d66e4ad18ac031		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C830 4616 bytes
font_01_sfnt_off0001d7e6.bin
db47dc4b768d64c83da2ebee3e7e916e038e0230fd832c8a59a48f9cde199abf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D7E6 16756 bytes
font_02_sfnt_off00020b94.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20B94 4324 bytes

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