Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac465d114caed1e…

MALICIOUS

PDF

48.6 KB Created: 2020-08-21 20:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 147c4d0b426e3079516f264d8c003f57 SHA-1: 2a5a161892454222088c019744a2d215190e4067 SHA-256: 0ac465d114caed1ee599056117db4f771fa6fb94439fdefa45b1e356d4214eff
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the PDF is part of a link farm or SEO poisoning campaign designed to redirect users to malicious sites.

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=pleomorphic+adenoma+of+parotid+gland+case+report
    • http://jivukeb.paulavanbeek.com/uploads/1/3/1/4/131407253/xoxipaf-wejise-nalasuvana.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/2153/9240/files/topical_antifungal_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7566/files/medical_tourism_marketing.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/50668180306.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0503/files/gupetisizozadajepedeki.pdf
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/24524908671.pdf
    • https://cdn.shopify.com/s/files/1/0429/4003/9324/files/jozovidabezasijipilis.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/bopagus.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/xukesirapuputi.pdf
    • https://cdn.shopify.com/s/files/1/0458/5917/6601/files/ascom_i62_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/pimejotiwekug.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/11040436203.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/51861111141.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_off00007e27.bin
22385ca20d4b6abf70f0ce89766a402f6f57970ceed5d74b7a64f867bc5d9f6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E27 5568 bytes
font_01_sfnt_off000090e8.bin
9472bd003791dc6d71877e553c22565ae632e0aab1ab8a9c31e9c2d553cba82c
pdf-font-stream PDF embedded font (sfnt) at offset 0x90E8 11128 bytes