Malicious PDF — malware analysis report

Static analysis result for SHA-256 340f62e52facd205…

MALICIOUS

PDF

36.2 KB Created: 2020-08-20 22:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a44b0287b8e4c0685820636ad84ddb86 SHA-1: 21fbe387ed66452fdbd5b7c857160144da670391 SHA-256: 340f62e52facd2054dcafcf618f816fe7ac19d9f9cc4e6932e9b220074fe23c2
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document body, though heavily obfuscated, includes the same URL, reinforcing the malicious intent. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic to distribute malicious content.

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=abba+mamma+mia+free+piano+sheet+music
    • http://files.foxfiregalleries.com/uploads/1/3/1/8/131856446/gulidaxas-zurasa-tetidafuxizi-kelila.pdf
    • http://sugigun.canadianculinaryinstitute.ca/uploads/1/3/1/0/131070420/3049138.pdf
    • http://fumugobud.beesbeautybar.org/uploads/1/3/1/4/131453536/2830903.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5831/4912/files/63012490961.pdf
    • https://cdn.shopify.com/s/files/1/0434/8697/0018/files/bleacher_report_epl.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/dawebujad.pdf
    • https://cdn.shopify.com/s/files/1/0431/2206/5557/files/medugisapezoxixuxozitowox.pdf
    • https://cdn.shopify.com/s/files/1/0431/9471/2228/files/98993224178.pdf
    • https://cdn.shopify.com/s/files/1/0434/2284/3036/files/fekaked.pdf
    • https://cdn.shopify.com/s/files/1/0427/9874/3719/files/cardiopatias_congenitas_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0430/4066/9849/files/zisavejamagixigewis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72905654063.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1414/files/bhat_br_modern_probability_theory_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/7261/8657/files/wawivozove.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_off00004e88.bin
97a11df04fed584dbd6ac1d09cdb6126976a107e8ff83d221c78e9b565fa2986
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E88 5352 bytes
font_01_sfnt_off0000608b.bin
603ccfc2888a9e4f4f34767ca9242751742efbaf211076eaca10e81167f8ce83
pdf-font-stream PDF embedded font (sfnt) at offset 0x608B 10420 bytes