Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ffe262ed6d3bab…

MALICIOUS

PDF

44.7 KB Created: 2020-08-02 13:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37593a6515a1b120f8eb2d7aa302323f SHA-1: 377a487a71f65003c9112ec74d4c2f46c03bc5d2 SHA-256: 44ffe262ed6d3bab377899b8c953aae3f05ce788d8d9a919560d348100dfb63f
152 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous embedded URLs, many of which point to external resources. One critical heuristic firing indicates a link to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=list+of+car+makes+and+models+excel'. This suggests the document is designed to lure users to malicious sites under the guise of providing information. 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=list+of+car+makes+and+models+excel
    • http://files.trinitybillings.org/uploads/1/3/1/8/131856195/vewofarivilab-diravisisuj-mopubojurowub-fezozu.pdf
    • http://files.allisanellwood.com/uploads/1/3/0/7/130776519/gizovuzavir.pdf
    • http://files.deborahlustig.com/uploads/1/3/2/7/132741334/3053309.pdf
    • http://files.littleblessingsofaloha.com/uploads/1/3/0/8/130813827/kilemiz-musuxexitubowes-jopep-kijepe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0021/files/87180271618.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/kurokoleniraw.pdf
    • https://cdn.shopify.com/s/files/1/0434/5374/3270/files/19803976355.pdf
    • https://cdn.shopify.com/s/files/1/0429/5871/7087/files/britney_spears_naked.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/84484181873.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/49976667778.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2675/files/blood_angels_8th_edition_codex.pdf
    • https://cdn.shopify.com/s/files/1/0431/1980/4578/files/waxewevuxukadog.pdf
    • https://cdn.shopify.com/s/files/1/0432/1050/6404/files/tabulelepafikasokal.pdf
    • https://cdn.shopify.com/s/files/1/0433/7179/0486/files/judidetewamesanexuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/zakoze.pdf
    • https://cdn.shopify.com/s/files/1/0434/6983/2357/files/10725541758.pdf
    • https://cdn.shopify.com/s/files/1/0430/8071/2346/files/wisovi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/62876715241.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e27.bin
3a71f6596002617ad2ede5fd4a745e9b069e2b6f973340baa7ce22ee98bd98a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E27 5240 bytes
font_01_sfnt_off00007ff1.bin
0b0e0c5f82fb574db490c63b1a4590a11843784c5ea1815365590686cb570eb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF1 11300 bytes

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