Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b22d0e74d526733…

MALICIOUS

PDF

40.2 KB Created: 2020-08-05 17:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4076f902872bb84098bf94557619943 SHA-1: e460ae42b5e4d7b6840d3048dfad2af8047bb46b SHA-256: 9b22d0e74d526733b55d815599e9f44b6404088967247c361edde428264cfb9a
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=vehicle+coordinate+system+pdf'. This indicates a phishing or malware distribution attempt. The document body is heavily obfuscated, but the presence of numerous links, including those pointing to Shopify domains, suggests a link farm or redirection strategy. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=vehicle+coordinate+system+pdf
    • http://files.tuaspices.com/uploads/1/3/0/8/130874381/4370ba42.pdf
    • http://feranowaj.saskcorpservices.com/uploads/1/3/1/3/131384401/fevijugolitoji.pdf
    • http://files.donnawardlehman.com/uploads/1/3/2/6/132695457/ac0e84f2a.pdf
    • http://files.eeulerum.com/uploads/1/3/1/4/131411474/b77b144bc99d3.pdf
    • http://files.stephenlemons76.com/uploads/1/3/0/9/130969305/vazomobaxutovoraz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8007882555.pdf
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/96106858877.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1084/files/sagitokudaduwipijimijo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gefoviliruvowej.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/26883489786.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/pogodotiduvu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8553/6159/files/vofitedopiwibawofik.pdf
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/85863036027.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/programming_language_pragmatics_solutions.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_off00005f84.bin
27a7a03294a46e37f5c6d932e43edfa181600ccde3ca5c0081229ff4e3f6f8c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F84 5460 bytes
font_01_sfnt_off000071f4.bin
14cfd570ccf89fea9b30fc9d98db973ec7a3fe2668408fe91508ff36058bd922
pdf-font-stream PDF embedded font (sfnt) at offset 0x71F4 9984 bytes