Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dcab03c894d144e…

MALICIOUS

PDF

59.0 KB Created: 2020-08-12 00:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c7fb09fc835d8e4fbad0b34a1e40bc3 SHA-1: dfbcfaa57c7a81dc2f2bea12206494ddfe51efd9 SHA-256: 0dcab03c894d144e822a9ef1856d52a802510039856c36017b1c151bca6b8b3c
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=animorphs+books+1+54+pdf'. The document body, though heavily obfuscated, also contains this URL, indicating an attempt to lure users to malicious content. The ML classifier 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.cc/pify?keyword=animorphs+books+1+54+pdf
    • http://files.simonfire.com/uploads/1/3/1/3/131380345/bibodosotadujizo.pdf
    • http://files.nicholsonspeedway.com/uploads/1/3/1/8/131856917/3119987.pdf
    • http://sutuzige.grizzlyridgestone.com/uploads/1/3/1/4/131406286/kefotexexakin.pdf
    • http://files.scottpaethdrums.com/uploads/1/3/1/3/131398428/7ad69.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5513/7447/files/88081442169.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51982080438.pdf
    • https://cdn.shopify.com/s/files/1/0430/8120/3861/files/lezizegalakanaxatusoz.pdf
    • https://cdn.shopify.com/s/files/1/0439/1842/6267/files/litasufelemirifasuzedugi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/19793266642.pdf
    • https://cdn.shopify.com/s/files/1/0447/0204/0217/files/rebedegero.pdf
    • https://cdn.shopify.com/s/files/1/0434/8873/9494/files/vetedajevajizutatoluzabe.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/cambridge_igcse_computer_science_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9288/files/67983293224.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/nevuxolikipimoxowunoxag.pdf
    • https://cdn.shopify.com/s/files/1/0431/6174/7605/files/fopupad.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5750/files/al_akhbar_egypt.pdf
    • https://cdn.shopify.com/s/files/1/0437/2617/6407/files/effective_problem_solving_and_decision_making.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/subulowu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/17892168862.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_off00009215.bin
a5eb513a4ca7dfb85d28d635753c008cfebf0ce2684d4181d49964e033a9cea4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9215 3472 bytes
font_01_sfnt_off00009e7d.bin
db738fa38eff9f689b2bea9aa5c49c54063a2abc79d6b1648850e32c163d9042		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E7D 5496 bytes
font_02_sfnt_off0000b100.bin
8ef0afb03c679adf61f6244d73f990a23a8ca1f6e8edacd29d0dbd06687194ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB100 14380 bytes

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