Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d451a4815736c9…

MALICIOUS

PDF

43.7 KB Created: 2020-08-15 08:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e3ae7b7a0ae3b2e7d52dfb5baddbb15 SHA-1: ee6fd62d2e1b0e8d8e801c125740671226a4d579 SHA-256: b5d451a4815736c9c524f97444f39df42461a0fa29e9f0b68e1c70650ef50b71
152 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains text related to Google Sheets and the malicious URL, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely for SEO poisoning or to distribute further malicious content.

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=google+sheet+filter+function+date
    • http://files.cynergysthairapy.com/uploads/1/3/0/8/130813420/1901792.pdf
    • http://xegunor.daytonsockcompany.com/uploads/1/3/2/7/132712323/9367416.pdf
    • http://files.coonhoundcamping.com/uploads/1/3/1/3/131398377/8787174.pdf
    • https://cdn.shopify.com/s/files/1/0438/2117/0850/files/65304446126.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/pujuvidajubalew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87743453122.pdf
    • https://cdn.shopify.com/s/files/1/0435/3910/3912/files/numibin.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/watchman_watch-_del-_all.pdf
    • https://cdn.shopify.com/s/files/1/0431/4896/8100/files/37563814041.pdf
    • https://cdn.shopify.com/s/files/1/0447/9166/0695/files/the_little_red_book_aa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/46255950522.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85755015361.pdf
    • https://cdn.shopify.com/s/files/1/0434/4122/5880/files/pivexetidenabif.pdf
    • https://cdn.shopify.com/s/files/1/0434/2566/1095/files/nifenajize.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/body_language_definition.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_off00006042.bin
1583ca94969c0ad9d6f1452d314cd9c53c1f01b100134efc60108c8176301b26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6042 5196 bytes
font_01_sfnt_off000071e8.bin
4470ca0bb7533b7f03c769002b722cfbafcf0b6b73106ed2dbf4225a07f01c70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E8 9884 bytes
font_02_sfnt_off000093de.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93DE 4324 bytes

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