Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e084620f5b2dbb…

MALICIOUS

PDF

49.4 KB Created: 2020-08-17 09:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ff5a5edaf4adc1c1e64ecdc45ccb3fc SHA-1: 67e387c07fb40af0d2cfe05d5304abd423784da2 SHA-256: 40e084620f5b2dbb39eea740b72eec438b7e8d05087ef5ec5724d66d65d94875
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body contains text related to a ringtone, likely a lure to encourage clicks on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=baazigar+o+baazigar+instrumental+ringtone
    • http://files.kovalabread.com/uploads/1/3/0/9/130969330/pesatazokemixubosor.pdf
    • http://zewumo.heatherrandall.com/uploads/1/3/1/4/131437724/juxasowijifatuzoto.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zenafepejeviwasi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/antimicrobial_activity_of_plant_extracts_by_disc_diffusion_method.pdf
    • https://cdn.shopify.com/s/files/1/0432/4383/1464/files/25058556117.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/3807962835.pdf
    • https://cdn.shopify.com/s/files/1/0428/8882/2950/files/fugiwafejimikudenajef.pdf
    • https://cdn.shopify.com/s/files/1/0429/3525/5203/files/voices_lyrics_disturbed.pdf
    • https://cdn.shopify.com/s/files/1/0431/0679/5686/files/caste_certificate_form_bihar.pdf
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/wigixijipe.pdf
    • https://cdn.shopify.com/s/files/1/0434/2729/9478/files/clinical_pharmacy_practice_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0448/1168/1958/files/vudisikozalemu.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_off00007d07.bin
6bcb7f518ad8a27e3b68665b34211053957512162279c1fa03d0dea917d62f97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D07 5244 bytes
font_01_sfnt_off00008ec8.bin
8c97cd6018c695cd162a10d578363e471661f950b718140bd79a688b652982c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC8 13492 bytes

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