Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca34d580cd37224…

MALICIOUS

PDF

42.9 KB Created: 2020-08-18 21:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6905cd0ffe87e6c6e44b2e87382898ed SHA-1: 4b0912cba325419bd04da01edecd8d13b8c476d3 SHA-256: 5ca34d580cd372242b0589e6641c2a1d1d0824e3ac0f39c1c21ff70ffea33ad4
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as 'ballantine books submission guidelines'. The ML classifier strongly flagged this PDF as malicious. The presence of numerous external links, many pointing to Shopify, suggests a link farm or SEO abuse tactic to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=ballantine+books+submission+guidelines
    • http://surifur.littlelanedaycare.com/uploads/1/3/1/6/131606490/nugogufipovuwoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6015/8873/files/42295749695.pdf
    • https://cdn.shopify.com/s/files/1/0437/0530/3190/files/fozelapojexidokonefeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/38837583944.pdf
    • https://cdn.shopify.com/s/files/1/0428/6686/8383/files/campaign_finance_reports_nc.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/249147747.pdf
    • https://cdn.shopify.com/s/files/1/0435/9821/7378/files/segment_routing_part_1_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/salovarezisusuvatilivegad.pdf
    • https://cdn.shopify.com/s/files/1/0433/5271/9515/files/agenda_2020_para_el_desarrollo_sostenible_espaa.pdf
    • https://cdn.shopify.com/s/files/1/0440/3773/4550/files/netacad_routing_and_switching_answers_chapter_5.pdf
    • https://cdn.shopify.com/s/files/1/0428/4973/0727/files/83051858184.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_off000068a1.bin
7092fa1f9874a5c0d97308b6957dc360a98a5d5b805ecdc60f4478e2c7e10f77
pdf-font-stream PDF embedded font (sfnt) at offset 0x68A1 5304 bytes
font_01_sfnt_off00007a94.bin
fe30cbe177d2931330a656b5c2cca53bde42455165854b07ddb90b0f170ef7bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A94 10788 bytes