Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f79b3644cae25bf…

MALICIOUS

PDF

47.2 KB Created: 2020-08-24 01:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 750c457c0470d82447988444992f3fc4 SHA-1: 739c600d21d70b4589a631b077cb3615152aade3 SHA-256: 5f79b3644cae25bf5db72de03c4d27d89f2dd205ce0b4357156d05cbb658410a
154 Risk Score

Malware Insights

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

This PDF document contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=atv+winch+cable+guide', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to malicious infrastructure. The presence of numerous other links to Shopify PDFs indicates a potential link farm or SEO manipulation tactic to disguise the malicious intent.

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=atv+winch+cable+guide
    • http://files.reviveinteriorsnw.com/uploads/1/3/0/7/130776573/2295007.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/kezelejiworupovomokezo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0789/3919/files/black_eyed_pea_salad_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0438/2500/4706/files/hypertension_treatment_guidelines_during_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/gixutewewafu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8787/2671/files/magik_bot_discord.pdf
    • https://cdn.shopify.com/s/files/1/0434/8326/7236/files/70708071586.pdf
    • https://cdn.shopify.com/s/files/1/0464/7521/5000/files/zugifopowukuroxonekipejep.pdf
    • https://cdn.shopify.com/s/files/1/0438/2470/9794/files/patterns_of_enterprise_application_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0448/4897/1938/files/fusionner_des_fichier_en_ligne.pdf
    • https://cdn.shopify.com/s/files/1/0433/4010/3845/files/83446334566.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_off00007b62.bin
76813f5959a138817c2e1ee56b1ad5f89e157a79c441aa4663c0e7a4523df815
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B62 5208 bytes
font_01_sfnt_off00008d1e.bin
a42d48bdc0b1e0824cd1614515bbeadcee59cb6d03deb8390a2a5c69e345eaa8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1E 10524 bytes