Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c4147c0be9ad763…

MALICIOUS

PDF

43.2 KB Created: 2020-08-19 11:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce7cbd46c2dcdb2d87302b482eef6847 SHA-1: 171d14f1008e616c91bd81f53eb6207b1255c900 SHA-256: 5c4147c0be9ad763ccb1f6b5ff79f8acb5409162072bfe1cc8d80799d41fac91
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body also contains this URL and numerous other links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users with a seemingly benign offer to click a 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/pify?keyword=free+trend+analysis+excel+template
    • http://files.verarey.com/uploads/1/3/1/1/131164129/3095173.pdf
    • http://files.bryangatescfi.com/uploads/1/3/1/4/131406781/lujufi_tizefa_tidapu_sunazuzem.pdf
    • http://files.melissarae-photography.com/uploads/1/3/0/7/130740375/wumonur.pdf
    • http://files.traceyboolgardenwriter.com/uploads/1/3/0/7/130775357/bofomaxenivafaxajof.pdf
    • http://files.gallery1515.com/uploads/1/3/1/8/131856160/vunosubunoropunar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5004/9446/files/xesodaweziporejilirux.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9588/files/logical_reasoning_and_mental_ability.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/copilot_bike_seat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18608783112.pdf
    • https://cdn.shopify.com/s/files/1/0432/8960/8360/files/92982924693.pdf
    • https://cdn.shopify.com/s/files/1/0437/5740/4309/files/37893630276.pdf
    • https://cdn.shopify.com/s/files/1/0432/6558/9414/files/sererona.pdf
    • https://cdn.shopify.com/s/files/1/0438/0521/2832/files/suvupumoda.pdf
    • https://cdn.shopify.com/s/files/1/0433/4937/7174/files/33201883006.pdf
    • https://cdn.shopify.com/s/files/1/0436/6457/2569/files/alkuu_kitap_indir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0569/7438/files/vonaxok.pdf
    • https://cdn.shopify.com/s/files/1/0433/7926/1590/files/rupiwodamejovakulapog.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_off00006b50.bin
013829375783c6718dbc0821d35ce737fffa8bed6ccb318149bb36044665756c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B50 5344 bytes
font_01_sfnt_off00007d72.bin
3ffeae3b8e46ae3744b3f6bb48ada7f3f7dec81865e9ee428411cc9bb7dbf176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D72 10080 bytes

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