Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a8150aa66f70cb…

MALICIOUS

PDF

43.6 KB Created: 2020-08-28 20:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aad1266ec3674d6e237a49374b27760f SHA-1: 354a48176a93bcfa565731f7af473898889aba9c SHA-256: 03a8150aa66f70cba586f673fc35f10955d642f172a6c0d61faefe6b235f1f29
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one prominently pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and other links to what appear to be SEO-optimized PDF files. This suggests the document is part of a link farm designed to redirect users to malicious sites, likely as a phishing or malware distribution lure.

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/wix?keyword=planeacion+formacion+civica+y+etica
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3218030698.pdf
    • https://cdn.shopify.com/s/files/1/0434/0563/9836/files/sizus.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9766/files/florida_attorney_oath_form.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4331bf6850348ae97cdea7eee0664fe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lomapatigusobotatijizu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0965/5462/files/pagaga.pdf
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/atualidades_para_concurso.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/arbatel_de_magia_veterum_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0437/3017/4101/files/introduction_to_the_theory_of_computation_sipser_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0440/4844/9701/files/business_poster_templates_psd_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/0754/9338/files/finejobin.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_off00005dd0.bin
53b19af393d20cc0e8afbefb79d38f621ff164214f039bc45620a814f59acd9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD0 4800 bytes
font_01_sfnt_off00006e06.bin
5dd9f2f707ac9130fa2f0d19e842017e918ae12bd6723ce45aee38cdebd5942a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E06 10952 bytes
font_02_sfnt_off000091b7.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x91B7 4324 bytes