Malicious PDF — malware analysis report

Static analysis result for SHA-256 0042462893e7ea2d…

MALICIOUS

PDF

44.9 KB Created: 2020-08-10 03:25:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b85fb718e606fd8126b27540a89dbb64 SHA-1: 724d9f87227b2c4ad659e7f4fef7f757fe34efdf SHA-256: 0042462893e7ea2d1a77035f1707d02408294595caf0510b9149aca97644cdc5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a redirector to malicious infrastructure. The document body also explicitly contains the URL 'https://ttraff.ru/pify?keyword=erling+kagge+silence+pdf', suggesting a lure to download a PDF that ultimately leads to malicious content. The presence of multiple Shopify-hosted PDFs and other obscure domains further indicates a link farm designed to obscure the true malicious destination.

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=erling+kagge+silence+pdf
    • http://navomuner.newmorningacu.com/uploads/1/3/1/6/131606289/60af981a7d2b133.pdf
    • http://golek.cashforgoldwc.com/uploads/1/3/0/8/130874524/peletanimu.pdf
    • http://files.globalsteameducation.org/uploads/1/3/2/6/132695301/9405102.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/aparato_digestivo_fisiologia.pdf
    • https://cdn.shopify.com/s/files/1/0440/4789/2630/files/86029885010.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/rogukasokoxerilivuwejuwi.pdf
    • https://cdn.shopify.com/s/files/1/0439/5696/1438/files/watugivuxokovesogotutipir.pdf
    • https://cdn.shopify.com/s/files/1/0438/2982/1602/files/5630481260.pdf
    • https://cdn.shopify.com/s/files/1/0447/9251/2678/files/quantitative_data_analysis_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/3477/9553/files/fajoduwajegalugesuji.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5050/files/digiplex_surprise_showtimes.pdf
    • https://cdn.shopify.com/s/files/1/0433/8080/1701/files/fujulexakuliropezag.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/setolewozaxabavuguminizew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94260126358.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_off00005aeb.bin
c647ff4b3efa7eb0abfdb1e34c0aeed5ef2924f4824dcc98b667669ba207a2cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AEB 6476 bytes
font_01_sfnt_off000070e1.bin
9151244e9c867f64c21208f935a1bcbe7711e019a28d35caa51ba9341c63a110		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E1 5344 bytes
font_02_sfnt_off00008327.bin
e4491ed99dbee7b4e9bc5aff38d3b773d2e2fb5bf79076b07e7128ab3d49a95a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8327 10428 bytes

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