Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3cee9f0d355741c…

MALICIOUS

PDF

43.2 KB Created: 2020-08-12 17:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9c2c54161381771fd09cf9aabdfaf3e SHA-1: 208a430afe6452b0eb34b82b08dec28b5bf01138 SHA-256: d3cee9f0d355741ca285379d3a271ff9e2f0ca31728f1445b7a5d531cf5c9e78
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a technical specification. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the URL that leads to the redirector, suggesting a social engineering lure. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm designed to improve search engine ranking for malicious content.

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=alienware+17+r4+specs+pdf
    • http://files.byanymeansbball.com/uploads/1/3/0/8/130814288/disomadisifosol.pdf
    • http://falejeba.lotusvivant.com/uploads/1/3/2/8/132814742/c1305b66513d.pdf
    • http://files.aim4theworld.org/uploads/1/3/1/6/131607158/96169.pdf
    • http://files.learningforcharity.ca/uploads/1/3/2/8/132814958/xinobufozub.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/mowofevefomopozuvu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8250/5637/files/xatizuzenimepedalozirix.pdf
    • https://cdn.shopify.com/s/files/1/0432/0837/6482/files/67305771540.pdf
    • https://cdn.shopify.com/s/files/1/0434/5036/8152/files/absorcion_de_farmacos.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/jilot.pdf
    • https://cdn.shopify.com/s/files/1/0435/8062/0955/files/cardiac_bed_making_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/67049758278.pdf
    • https://cdn.shopify.com/s/files/1/0433/4731/2789/files/26674969019.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1133/files/impractical_jokers_season_4.pdf
    • https://cdn.shopify.com/s/files/1/0437/9181/0717/files/28656412381.pdf
    • https://cdn.shopify.com/s/files/1/0430/6416/4506/files/19258612587.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6369/files/lobosamipetutitozukivik.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e22.bin
2745f91fb6ca6866f87bc709bcfb3a6af30287e65344123fc1bb8f9562598a32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E22 5048 bytes
font_01_sfnt_off00006f6c.bin
e6a83e7d4ebd116acd0f779d8e5ad4d412614691d101822ae41452d40e0bd890		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6C 10256 bytes
font_02_sfnt_off0000923e.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x923E 4324 bytes

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