Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aad5204beba00f5…

MALICIOUS

PDF

41.4 KB Created: 2020-08-02 11:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed7ce9694c92683126441a2bc86f2fbc SHA-1: dc8db4928209385b600428203385c87750903445 SHA-256: 5aad5204beba00f55bde52634c354177540a41d0aa226b1f824bf2a9e6762a3f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One prominent URL, 'https://ttraff.ru/pify?keyword=six+foot+seven+foot', is flagged as a malicious redirector. The document body contains garbled text but includes the malicious URL, indicating an attempt to obscure the malicious intent. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggest a phishing or malicious redirection attack.

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=six+foot+seven+foot
    • http://files.canoetaxi.com/uploads/1/3/1/1/131164524/gogopug_lujonikigikup_mafano_gazigimuxe.pdf
    • http://files.andrewogus.com/uploads/1/3/0/9/130969176/4478656.pdf
    • http://files.fairytalefit.com/uploads/1/3/1/4/131407709/komaxakupodaveg-favemezasek-walivuk-deliwixe.pdf
    • http://files.steveatkinsondesign.com/uploads/1/3/2/7/132741089/9222032.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/pesoginafazap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mafimovudowejiner.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.pdf
    • https://cdn.shopify.com/s/files/1/0440/2115/3957/files/jufuvuza.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/deregelabugufa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3464/8474/files/wivorazekizokiwa.pdf
    • https://cdn.shopify.com/s/files/1/0437/5547/1002/files/44571899392.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/jazenux.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/porubibagolij.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/96664887401.pdf
    • https://cdn.shopify.com/s/files/1/0432/8715/0752/files/wixotuxunejalulaxava.pdf
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/85351969443.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugerivedisabuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/64565021284.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_off000065de.bin
2cce91bc58fe39b0d981f764fbbeb97e5888b1fc53edf16aab532b8a1917dba1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65DE 4656 bytes
font_01_sfnt_off000075d9.bin
794ae50ac3b79fadd5db07554c9747cf3713e94e208ade61a703a072b93fa62c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D9 10232 bytes

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