Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c0c01358b58616…

MALICIOUS

PDF

41.2 KB Created: 2020-08-20 19:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b090db61c1aa28a1a19a3d5d856ef961 SHA-1: 44033553c147033f88e2fa7cf225763e99f73ce0 SHA-256: 93c0c01358b5861612bf055b21fcf31b8b7d10cf4fcfbf73390b30d2fe8c581f
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains but ultimately redirect to a malicious URL (ttraff.ru). This indicates a link farm or redirection tactic designed to obscure the final malicious destination. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the primary attack vector is the malicious redirection links.

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.ru/pify?keyword=materiales+compuestos+derek+hull+pdf+descargar
    • http://files.michaelrlado.net/uploads/1/3/0/8/130814345/84968f914d31c1.pdf
    • http://files.streetlynxshop.com/uploads/1/3/0/7/130775462/a36de12a.pdf
    • http://rusezal.auburninvestmentgroupllc.com/uploads/1/3/0/8/130814328/f1df3.pdf
    • https://cdn.shopify.com/s/files/1/0445/5736/9503/files/rinuwoditonedamurovobo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/jeniwolotetiwuw.pdf
    • https://cdn.shopify.com/s/files/1/0440/0611/3430/files/66322311066.pdf
    • https://cdn.shopify.com/s/files/1/0436/5425/0654/files/fundamental_of_actuarial_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0439/0001/0664/files/filosofia_de_la_ciencia_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0432/6480/2982/files/74930371255.pdf
    • https://cdn.shopify.com/s/files/1/0433/0756/5209/files/assam_tet_question_paper_assamese_medium.pdf
    • https://cdn.shopify.com/s/files/1/0434/2598/8757/files/50347797386.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8472/files/makalah_etika_utilitarianisme_dalam_bisnis.pdf
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/59304721172.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4008/files/remove_newline_from_string_python.pdf
    • https://cdn.shopify.com/s/files/1/0437/5461/9041/files/delududilubupet.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/hungry_shark_heroes_hacked_apk.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_off000051fe.bin
61bc50ac63083082b3760deec407b82514cc7c345453cf949e714634ca6681f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x51FE 5416 bytes
font_01_sfnt_off00006471.bin
b5088f422075a7be655d95efaf9f6de8bf8df85358803f8a0c79e7fb7c9834b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6471 10760 bytes
font_02_sfnt_off000087dd.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x87DD 4324 bytes