Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d64a903f1b011d9…

MALICIOUS

PDF

50.4 KB Created: 2020-08-18 21:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfd0811a586d57a2757476243d3dac5c SHA-1: ec043b5ec3bac0dc83de192a7062d7ad1e0d6357 SHA-256: 7d64a903f1b011d9f0aa31c912256f0a12348d984010a8b3a11afae5a8ca1357
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=agni+natchathiram+songs++masstamilan'. This URL is embedded within the document body, suggesting an attempt to trick users into clicking it. The presence of numerous other PDF links, many pointing to Shopify domains, indicates a potential link farm or SEO manipulation tactic to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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=agni+natchathiram+songs++masstamilan
    • http://lumafawi.pefrederiksen.com/uploads/1/3/1/4/131437919/3322177.pdf
    • http://files.njsaferatios.com/uploads/1/3/2/7/132712011/xigevewiti.pdf
    • http://komuf.southsidepecompany.com/uploads/1/3/0/7/130739723/1255188.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0433/7254/4150/files/forklift_inspection_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6238/files/potekoxozedajejidodag.pdf
    • https://cdn.shopify.com/s/files/1/0428/1024/5286/files/ganujazunapolezo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/61395001723.pdf
    • https://cdn.shopify.com/s/files/1/0439/8202/8958/files/powerpoint_best_design_business_templates.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/golalebilafofuzugetuvi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4913/9880/files/xamaf.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_off000069ea.bin
9e9abd679587294034ccb3e5adfab63d26eda727e2ce9086ab5bc52a30300ea0
pdf-font-stream PDF embedded font (sfnt) at offset 0x69EA 5204 bytes
font_01_sfnt_off00007b68.bin
dd7ffa500d1b1a2fa4bc86259bde5ed02cf82c68c15f183ef37b42c1f19a46f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B68 12680 bytes
font_02_sfnt_off00009a19.bin
4a87e82abf6174ba12e9284db09856e41819d50e68c0302e766536b8a51788ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A19 10168 bytes