Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7f7939d694048e…

MALICIOUS

PDF

41.5 KB Created: 2020-08-26 04:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08f77cad053a9ab79dbed5fde9251ba3 SHA-1: c4e453c0e0184dc01173bb04a6850e761dac189f SHA-256: ad7f7939d694048eb75ee6f5ec56818e0e6605ef4642248425169d2574cb0190
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on Shopify, suggesting a link farm or redirection scheme. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to a malicious site via embedded links.

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.com/pify?keyword=har+dard+ki+dawa+hai+muhammad+ke+shaher+mein+mp3+free+download
    • http://files.stonetreematerials.com/uploads/1/3/1/1/131163957/35aaee013.pdf
    • http://cinurl.com/14suplWatch,,,Mohamm
    • https://cdn.shopify.com/s/files/1/0434/0501/7238/files/63703844613.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/marathi_song_ala_baburao.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/vebizusafevepufagur.pdf
    • https://cdn.shopify.com/s/files/1/0432/8361/1801/files/badivowobozoxekusosorino.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/rikagakunitozutelugewo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/17767839857.pdf
    • https://cdn.shopify.com/s/files/1/0439/1079/1323/files/28042697374.pdf
    • https://cdn.shopify.com/s/files/1/0431/9808/7328/files/87881349585.pdf
    • https://cdn.shopify.com/s/files/1/0428/5821/7631/files/revakal.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bf6.bin
0d93679dd91422886e736fef809f78c554e3ed51ff3d60a932addd6a0609a395
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BF6 5364 bytes
font_01_sfnt_off00005e11.bin
1b90fdda51e1b7087e939040b2232c5429560a2dbf9f144e0e45cad71777bd2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E11 14324 bytes
font_02_sfnt_off00008ab6.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB6 4324 bytes