Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c80209a83966f18…

MALICIOUS

PDF

51.3 KB Created: 2020-07-28 22:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb4a390b31497faf249573b2fff4565f SHA-1: f37bb6a295d3ebb05d4f8fd1d865a9da0a85e49a SHA-256: 5c80209a83966f184c76137bac4edfc5a75bd0f6b2b78e7d89d51c60e696749b
154 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to Shopify-hosted PDFs, which is indicative of a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=carlos+castaneda+pdf+gratis'. While no scripts were extracted, the presence of malicious links suggests the document is designed to redirect users to harmful content or facilitate further compromise.

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=carlos+castaneda+pdf+gratis
    • http://files.northwellingtonanimalhospital.com/uploads/1/3/1/3/131381480/mubatuxunavuvotora.pdf
    • http://files.mnjeweler.com/uploads/1/3/1/4/131437740/fomurogoxufirofaliz.pdf
    • http://files.thebrewnextdoor.com/uploads/1/3/1/8/131856108/wibesenov_ruduzizuvupo_wotubirujirixu_mexozajuzuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/59520763498.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8711/files/55626473265.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/bukorisozot.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/62132734505.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0268/files/47323225061.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/jatedonidogasebufowoxo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/51552519851.pdf
    • https://cdn.shopify.com/s/files/1/0431/8432/4770/files/91557231786.pdf
    • https://cdn.shopify.com/s/files/1/0429/1595/4847/files/memivadumerufepukozit.pdf
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/15790028075.pdf
    • https://cdn.shopify.com/s/files/1/0431/0401/0389/files/2577340270.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_off00008c63.bin
a7e47ca265da23b2484534ba8a0127f02ab7ab0330da86f818205a4aa972d7f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C63 5132 bytes
font_01_sfnt_off00009de7.bin
73562beb2902835fdb1f2b8f8488d2bd06d30fad9469d1792b5f4a0480fa5948
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE7 10000 bytes