Malicious PDF — malware analysis report

Static analysis result for SHA-256 646288fc47eff4b1…

MALICIOUS

PDF

43.5 KB Created: 2020-08-14 02:18:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 239ca2bd4f591b9107346113767f598a SHA-1: d421b305aaaed4fbffc8f5cd710360eb83754bd4 SHA-256: 646288fc47eff4b13bcfeecdd1f39e348bab42a436966ba734e21ea664e60021
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, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious infrastructure. The document body text and embedded URLs reinforce the lure of finding specific PDF content, likely to trick users into clicking the malicious link.

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/wb?keyword=design%20of%20machine%20elements%20mcq%20pdf
    • http://files.dubayhomeinspections.com/uploads/1/3/1/6/131606331/9956858.pdf
    • http://files.methodistchurchguyana.org/uploads/1/3/1/6/131637562/39db79095e6.pdf
    • http://files.oldgraycatherbs.com/uploads/1/3/1/8/131858916/lavenena-miradorufutig.pdf
    • http://files.motionalstudios.com/uploads/1/3/2/3/132303043/3e1003e164ceae9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/dojasalikugaganikolumini.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/hooked_on_a_feeling_original.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/dapitefexowewomonika.pdf
    • https://cdn.shopify.com/s/files/1/0450/0901/0852/files/netosatizo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2641/files/26823183928.pdf
    • https://cdn.shopify.com/s/files/1/0438/0740/8290/files/68889172395.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/dawubagozazenibojoz.pdf
    • https://cdn.shopify.com/s/files/1/0427/3173/3159/files/biwixetizagurutodivopoze.pdf
    • https://cdn.shopify.com/s/files/1/0432/7351/9272/files/98161613240.pdf
    • https://cdn.shopify.com/s/files/1/0430/9791/5545/files/generic_statistical_business_process_model.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/jusawujupil.pdf
    • https://cdn.shopify.com/s/files/1/0433/5996/1239/files/google_drive_titanic.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ferenap.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_off00005da0.bin
2f42a41727c1fdd6e811b738534498ec0be39298afca0b6f00ed0ad8e272bd0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA0 5384 bytes
font_01_sfnt_off00006fc4.bin
49fc1550b745f478a8341e75cd1529f20ed81cee49d767259b5626e533a3559b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC4 10296 bytes
font_02_sfnt_off000092d0.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92D0 4324 bytes

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