Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c39e7d4c11fb988…

MALICIOUS

PDF

47.4 KB Created: 2020-08-18 23:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d10e742dc19ad2baac10230791126968 SHA-1: e0f90590ccf02a89b26910ad7fb3ba9d88cd2d7c SHA-256: 2c39e7d4c11fb988950e221ed429e17d56aa2899b3eeb229e224dac10b94e083
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one pointing to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, contains text related to train schedules and the PDF creation tool, likely serving as a lure. The presence of a link farm heuristic further indicates an attempt to distribute malicious content or SEO spam.

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=new+delhi+amritsar+shatabdi+departure+platform
    • http://xuwajo.a-pamperedpooch.com/uploads/1/3/0/7/130740596/kaleruvibizafa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9931/6639/files/95012893828.pdf
    • https://cdn.shopify.com/s/files/1/0431/3484/5079/files/84742206118.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/marine_insurance_underwriting_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3318/files/blast_protection_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/54094018551.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/wijenadodejuxapekowa.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/lafapenomodazupomuwix.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/4238304407.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_off00005bbb.bin
15bf43a6098ff7d7fa8077f9039b46066c81b3ef371425d18ae8ecf7d0ecc0e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBB 5480 bytes
font_01_sfnt_off00006e44.bin
e23ad81eb2d45f7918c90a14c15d0f6ac9cd4a4e268cf6011d45e23cbb2ebf70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E44 14552 bytes
font_02_sfnt_off00009bb5.bin
3c2d4e5b9764f313c412df82b75ed7ae543cb30c20c52fefa62bc8cce13853e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB5 16104 bytes

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