Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eca83a62995a7e1…

MALICIOUS

PDF

41.8 KB Created: 2020-08-19 14:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab93cbfdc85610fbb37a5f840146c84f SHA-1: 96a8723e63e0f9708166d8f955d68e6da0555f9e SHA-256: 2eca83a62995a7e1798d03191dbac60867742728293a2ddeeee1533f350b7349
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, disguised with text suggesting a 'Matlab installation guide pdf'. This link, 'https://ttraff.cc/pify?keyword=matlab+installation+guide+pdf', is designed to lead users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, with numerous external links, and the 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests it may be part of a multi-stage attack involving password-protected archives.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=matlab+installation+guide+pdf
    • http://files.somabodytherapy.com/uploads/1/3/1/3/131378899/jurimenogetusafudige.pdf
    • http://files.queenieproductions.com/uploads/1/3/2/7/132740288/893039.pdf
    • http://files.wesleycollegecollective.com/uploads/1/3/1/4/131437276/2901611.pdf
    • https://cdn.shopify.com/s/files/1/0430/0328/1571/files/past_simple_past_participle_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0434/2117/1864/files/fundamentals_of_investing.pdf
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/antimicrobial_stewardship_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/begakosavawepogekazev.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/xonitakonizosaz.pdf
    • https://cdn.shopify.com/s/files/1/0439/8999/1582/files/26791444976.pdf
    • https://cdn.shopify.com/s/files/1/0430/8579/1393/files/milurevenaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3253/files/48350250383.pdf
    • https://cdn.shopify.com/s/files/1/0435/5181/7883/files/duel_masters_episode_1_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0438/8611/7019/files/jipeduperubenurave.pdf
    • https://cdn.shopify.com/s/files/1/0440/1460/0342/files/tinkers_construct_guide_1._12.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/3356120034.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006539.bin
cff714e988607736cec226f09f004c4bf68187dd0c4513959d63c2f39c1280ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x6539 5260 bytes
font_01_sfnt_off0000772d.bin
5e6ce162157de5bdaa2aebafb2ca240279c9494667c2445b39780dd43dc84f93
pdf-font-stream PDF embedded font (sfnt) at offset 0x772D 10300 bytes