Malicious PDF — malware analysis report

Static analysis result for SHA-256 770a351c33f3b6f1…

MALICIOUS

PDF

40.6 KB Created: 2020-08-12 20:22:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c87e7f0c258eb9e4b890d1cfbda203f3 SHA-1: 05dbeb10830a1486af006d27db19433a15632f4f SHA-256: 770a351c33f3b6f1587a1a9af3583c031fe2434db9a29dbf5358b43bf4dc9f2b
194 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, a common tactic for link farm SEO abuse and redirecting users to malicious sites. The primary link identified, 'https://ttraff.ru/wb?keyword=basics%20of%20batting%20in%20cricket%20pdf', is flagged as a malicious redirector. The document's content, despite appearing to be about cricket, is likely a lure to encourage clicks on these malicious links, fitting the pattern of an advance-fee scam.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/wb?keyword=basics%20of%20batting%20in%20cricket%20pdf
    • http://files.kkountryfarm.com/uploads/1/3/2/6/132682974/d7e0e1c17bc.pdf
    • http://files.crossingovercdc.org/uploads/1/3/1/3/131379211/6415129.pdf
    • http://gopazutux.isthisthepoint.com/uploads/1/3/1/6/131607600/4985612.pdf
    • http://files.santacruzmasters.org/uploads/1/3/0/7/130775792/8b8bd8130418cc1.pdf
    • http://puwem.burrow.nyc/uploads/1/3/2/6/132682787/0d5f71a5e70a9a1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/jododutimojegaferakoki.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2871/files/alzheimer_s_vs_dementia.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/susenonelukagusobalo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2310/files/bometilogagazuwusonumejon.pdf
    • https://cdn.shopify.com/s/files/1/0431/8091/6893/files/nepifiganovunalixasonex.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/28220115836.pdf
    • https://cdn.shopify.com/s/files/1/0429/4210/3719/files/amazing_tales_complete_kids_rpg.pdf
    • https://cdn.shopify.com/s/files/1/0437/3423/7345/files/fuxizekufuripalereli.pdf
    • https://cdn.shopify.com/s/files/1/0429/6835/0873/files/weviketumekeru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0648/3876/files/80193244631.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_off00006168.bin
ee9cfb893291b26ae299042235ef9eed5d256c5afe91d653a85d41bde258955d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6168 5544 bytes
font_01_sfnt_off00007440.bin
a347f7d481b66969cabb2b7770ce539cb9f5c6243227764ef441c5c3a80c9f48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7440 9648 bytes

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