Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a0d9420d7a6b78…

MALICIOUS

PDF

69.4 KB Created: 2020-08-12 14:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebc533ec56b61f30090eb642b73e8cb7 SHA-1: cf126788687568b3a246b9f38d19ba37d45e87be SHA-256: 61a0d9420d7a6b7884d5dda7f90e98202c6c85add3625675fba06474c5e76592
194 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 for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.ru). The document body, though heavily obfuscated, contains the same URL and keywords related to quality control, indicating a lure. The presence of password-protected archive lures suggests an attempt to bypass gateway scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=definicion+de+control+de+calidad+segun+autores+pdf
    • http://files.lazuliliterarygroup.com/uploads/1/3/1/1/131164402/4831477.pdf
    • http://files.newellbooks.com/uploads/1/3/0/8/130813797/vapujulo_rajeker_vewidufe.pdf
    • http://files.tanlaagoura.com/uploads/1/3/0/8/130873983/2324736.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3108/4708/files/sulivatovotibuji.pdf
    • https://cdn.shopify.com/s/files/1/0432/6303/3507/files/85623420391.pdf
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/17681967976.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/long_term_causes_of_ww1.pdf
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/rudogigajizamopo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/43658927266.pdf
    • https://cdn.shopify.com/s/files/1/0435/2075/3823/files/health_hazards_of_alcohol_consumption.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29876283886.pdf
    • https://cdn.shopify.com/s/files/1/0431/7711/5812/files/22249420553.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2303/files/past_simple_and_past_continuous_exercises_esl.pdf
    • https://cdn.shopify.com/s/files/1/0445/9141/5460/files/acorn_80_stairlift_installation_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/gre_official_guide_2016.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_off0000c2e1.bin
18cabe73b32b30199e25e19421e966696b9c6a059f97c642fa49115855da3f92		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E1 5204 bytes
font_01_sfnt_off0000d4a1.bin
9bd343675970fe6c4856ac524a18dc686dde79f67f81f7ff3b9bd19e83cf350b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A1 10868 bytes
font_02_sfnt_off0000f835.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF835 4324 bytes

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