Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2cd04e7c13a020…

MALICIOUS

PDF

50.4 KB Created: 2020-08-05 13:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74a67dba472505c3a18965d3e1ee9aee SHA-1: 28359732c5284affd13e7567b590afba866e3bdd SHA-256: 5d2cd04e7c13a02062db128b8c90f47a6eeee1a6408dcd0fd9613f24d3747808
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://ttraff.ru/pify?keyword=cause+and+effects+of+unemployment+in+the+philippines+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, indicating an attempt to direct users to malicious infrastructure.

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=cause+and+effects+of+unemployment+in+the+philippines+pdf
    • http://vixope.stressfreesettlements.com/uploads/1/3/1/4/131408100/nekizimezewiduf.pdf
    • http://files.stgeorgehilton.org/uploads/1/3/0/7/130775726/navekadat.pdf
    • http://files.mechanicalairconcepts.com/uploads/1/3/1/8/131871778/7873092.pdf
    • http://files.ailsajwatson.com/uploads/1/3/1/6/131606953/ebcd5f9e4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8575/7606/files/23424454794.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33540287451.pdf
    • https://cdn.shopify.com/s/files/1/0434/5220/3161/files/how_to_dump_3ds_games.pdf
    • https://cdn.shopify.com/s/files/1/0437/5989/4689/files/pocket_ref_thomas_glover.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.pdf
    • https://cdn.shopify.com/s/files/1/0431/6466/3967/files/rasowiriw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7210/2301/files/valse_d_amlie_poulain_partition_piano.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/50863433830.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/tableau_d_amortissement_degressif.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/61826808601.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/22256399768.pdf
    • https://cdn.shopify.com/s/files/1/0434/3067/4597/files/vibujeviweveliwapapazevaz.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_off000086dc.bin
878bf633d1aa190e0ce0f198cfeadce260791cb9826c8dc1c07fb14816e7303e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86DC 5304 bytes
font_01_sfnt_off000098cb.bin
a9d88232a57c1b0622aa0cbe5dee5721c7a971c2c4b52ff96e2a4d23b70833d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98CB 10336 bytes

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