Malicious PDF — malware analysis report

Static analysis result for SHA-256 25fa9b68e61d8e0f…

MALICIOUS

PDF

83.7 KB Created: 2020-08-26 06:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be0603ee74046d4633569776d7d7bd5f SHA-1: 7c196faa49dfb2873910271617f700f88217e861 SHA-256: 25fa9b68e61d8e0f0054f35959d270721a5e146230b4b53902be7928ca7e0369
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. This link is presented within the document body, disguised as a file download. The PDF also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic to obscure the malicious redirector. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.club/pify?keyword=technical+analysis+for+dummies+_2nd_edition.+pdf
    • http://files.berlangadentures.com/uploads/1/3/0/8/130873795/papusowe_buraruteruluruj_zigegafoxuw.pdf
    • http://raxuzij.ckc3.org/uploads/1/3/1/3/131379594/tejobalunira-beboli-lofut-jeketovat.pdf
    • http://gexagajov.volleyballexperience.net/uploads/1/3/1/4/131453945/c325b64cc59.pdf
    • http://files.weddingmemory.co.uk/uploads/1/3/1/4/131405977/rikefazobig.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/xakiroxivibekopozefelame.pdf
    • https://cdn.shopify.com/s/files/1/0455/4752/0165/files/87160273314.pdf
    • https://cdn.shopify.com/s/files/1/0450/0629/1102/files/56231699411.pdf
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/emerald_tablets_translation.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/nubizus.pdf
    • https://cdn.shopify.com/s/files/1/0440/9825/7048/files/wokum.pdf
    • https://cdn.shopify.com/s/files/1/0431/6905/4886/files/basic_electrical_and_electronics_engineering_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/8466/0380/files/subordinating_conjunctions_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/subject_and_verb_agreement_practice_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0438/1055/4013/files/sumilixetupa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8874/7423/files/aditya_birla_sun_life_insurance_receipt.pdf
    • https://cdn.shopify.com/s/files/1/0457/9970/2694/files/35362387004.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.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_off0000f008.bin
2d6853ce4aba2a4a906f9d4ffd5545f3e96f46b5d56744269f1b18059617144d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF008 5520 bytes
font_01_sfnt_off000102af.bin
87002c8f6aa3bd3e02bafe74d6f5ca046b153842d7a9fc2f692f00f166da058a
pdf-font-stream PDF embedded font (sfnt) at offset 0x102AF 15584 bytes
font_02_sfnt_off000132ad.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x132AD 4324 bytes