Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9badc9f287aa48e…

MALICIOUS

PDF

36.9 KB Created: 2020-08-02 09:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d182f684d297dbfd0ebae7028661ed39 SHA-1: 73558f1abb53af8f28e1ca262e6ca00f28632a1b SHA-256: c9badc9f287aa48ecbf8fd1276685aaacf590f5d772ded22e3d9e1635c301c9b
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=john+deere+lt160+parts, which is flagged as a malicious redirector, indicating an attempt to lead the user to a harmful 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=john+deere+lt160+parts
    • http://files.chapelbythelake.net/uploads/1/3/2/6/132695493/feliju.pdf
    • http://files.forthehonorproductions.com/uploads/1/3/0/7/130740514/7830928.pdf
    • http://files.cghcollectibles.com/uploads/1/3/2/6/132681394/01e3dfb639919.pdf
    • http://files.garfinkelseruya.com/uploads/1/3/1/8/131872198/0e62887a8f7d.pdf
    • https://cdn.shopify.com/s/files/1/0431/6001/0906/files/gatunoponezawar.pdf
    • https://cdn.shopify.com/s/files/1/0434/5826/5238/files/4871037833.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zofoxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/vejofe.pdf
    • https://cdn.shopify.com/s/files/1/0435/6328/6691/files/20451782495.pdf
    • https://cdn.shopify.com/s/files/1/0429/0917/1871/files/15776082061.pdf
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/granny_smith_free_games.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52209678420.pdf
    • https://cdn.shopify.com/s/files/1/0437/4354/3450/files/zasikepujozubuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3817/files/xolenanazufedapona.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mizamolapo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0449/3987/files/pitorepobalakiruko.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/kenugadazatukolexu.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_off0000512c.bin
ec36c69ac0fbc0f0aa0d863997d32c6757a627174249ff6c4a664497370736a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x512C 5384 bytes
font_01_sfnt_off0000636d.bin
e1de846968c80a9aa3968ec82121c648873ab8eb6537b94ad760ebb9a793c209
pdf-font-stream PDF embedded font (sfnt) at offset 0x636D 10324 bytes