Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c1ead6a83a9dc3…

MALICIOUS

PDF

54.8 KB Created: 2020-08-11 04:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34e816b37500ee78350b15b53e2f3f5f SHA-1: d503d65bad4bb307f32e2d26c52912ab41a7f52b SHA-256: f7c1ead6a83a9dc3296912e52b56f0936b73d27ce5f65eaac87dda890c0c0c4b
152 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 'https://ttraff.ru/pify?keyword=arthur+rimbaud+illuminations+pdf'. Additionally, it exhibits a PDF link farm heuristic, with numerous links, many pointing to Shopify domains. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL and a search query related to 'arthur rimbaud illuminations pdf', suggesting a lure to a malicious site.

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=arthur+rimbaud+illuminations+pdf
    • http://vibezuxux.rubinvisalaw.com/uploads/1/3/0/7/130776445/9991361.pdf
    • http://files.loutildelapub.ca/uploads/1/3/0/7/130739662/nokofinafitomel-sevexowobixuxiv-xuponum.pdf
    • http://files.stapletonfarm.com/uploads/1/3/2/3/132303219/6cf63.pdf
    • http://files.diapersaway.ca/uploads/1/3/1/4/131409210/mudol_gunopu_zezafod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9027/files/thyroid_diet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7885/files/bikepo.pdf
    • https://cdn.shopify.com/s/files/1/0443/9814/9798/files/pdf_botanica_basica.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunazazaxukatokezidabu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/zagagunadekumafejozukasag.pdf
    • https://cdn.shopify.com/s/files/1/0431/7514/9719/files/demewajiwepiwovivegojozan.pdf
    • https://cdn.shopify.com/s/files/1/0434/5213/7622/files/87734343735.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54748680829.pdf
    • https://cdn.shopify.com/s/files/1/0438/0943/9906/files/51616077718.pdf
    • https://cdn.shopify.com/s/files/1/0435/5194/8963/files/25722458631.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/fetuvazazapuge.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_off00009934.bin
c5c418db0ceb75a6b35c933cd0f756ae8793e3ebfb3ba8f65bf4c26d9f0eac8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9934 5412 bytes
font_01_sfnt_off0000ab6c.bin
a3dac517579ee9560013b5eeffa49ff8c5783993c28032884150b77938564521
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB6C 10156 bytes