Malicious PDF — malware analysis report

Static analysis result for SHA-256 7309748a99bf4d20…

MALICIOUS

PDF

33.6 KB Created: 2020-08-24 19:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8080f6272f0ae5f27875bb73264ffb7e SHA-1: 7edba27e1d523c1160d05fa89cd04a505d7aafce SHA-256: 7309748a99bf4d20f5de1408997940d55cd7d47a60d19e4e72b940413807314f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a template for a router bit. The document also functions as a link farm, directing users to numerous other PDFs hosted on Shopify and other domains. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or scam attempt.

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=router+bit+for+door+hinge+template
    • http://zomik.craftyfoxx.com/uploads/1/3/0/7/130776065/680476.pdf
    • http://nemibuz.ostendmarineservices.com/uploads/1/3/0/7/130738836/913396.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8507/8434/files/95473764952.pdf
    • https://cdn.shopify.com/s/files/1/0452/8803/0370/files/yowhatsapp_apk_2018_espaol_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kofuka.pdf
    • https://cdn.shopify.com/s/files/1/0435/7976/8995/files/tobalebitetemamutovali.pdf
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/41149678878.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5676/files/50946638486.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/99862489243.pdf
    • https://cdn.shopify.com/s/files/1/0438/0046/1474/files/70809707165.pdf
    • https://cdn.shopify.com/s/files/1/0432/7548/5348/files/30278060624.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78046530146.pdf
    • https://cdn.shopify.com/s/files/1/0440/5844/3941/files/42512944149.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_off000047ae.bin
aeac2133d4a3b3093473a55d9bd8f32f3e9eb8b672dd2a39f87f9261420af529
pdf-font-stream PDF embedded font (sfnt) at offset 0x47AE 5424 bytes
font_01_sfnt_off000059f3.bin
44bd49570d946351dbef3f9773c4eb99cfebfa5e25a82bc8e57af6913f5123c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x59F3 9336 bytes