Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de972ba16e7906f…

MALICIOUS

PDF

32.1 KB Created: 2020-08-23 20:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3015349534a8b928cd898cc4195eb3b9 SHA-1: 51fa6499ce2bb0391b0d9c7e83096ce9bf70f958 SHA-256: 6de972ba16e7906fab478b6a0be5842b10e5a1c1bab5deebe39f83282186e721
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.ru/pify?keyword=video+games+lana+del+rey+sheet+music, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to lure users to malicious infrastructure.

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=video+games+lana+del+rey+sheet+music
    • http://ludod.musicteachers.london/uploads/1/3/0/8/130813846/sewularosuvoz-girap-bewekemoseka.pdf
    • http://dovif.leluxhomescents.com/uploads/1/3/2/7/132712354/321a8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/45702947970.pdf
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/mac_terminal_commands_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/5065690807.pdf
    • https://cdn.shopify.com/s/files/1/0433/6150/1336/files/best_secret_video_recorder_apps_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/lisavedidesunaleboro.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/30685549684.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5498/files/25949435849.pdf
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/nupafovezodevi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6051/files/hyundai_avante_xd_2020_manual_pdf.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_off000040fb.bin
3c0806fdeff7b5b4999b382b573ec2ff0bb9e31338273907657707858f76d130
pdf-font-stream PDF embedded font (sfnt) at offset 0x40FB 5420 bytes
font_01_sfnt_off00005341.bin
926e6013996925d38669cc8155cb0b0667a3823f896d0b0e60ab75c923f89522
pdf-font-stream PDF embedded font (sfnt) at offset 0x5341 9576 bytes