Malicious PDF — malware analysis report

Static analysis result for SHA-256 df94c2c675ffa787…

MALICIOUS

PDF

41.6 KB Created: 2020-07-31 22:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2fd8786eef8393c71d303c600ccbd34 SHA-1: 284c7679c1afe29ed2e08bbb008a35cfd7b100ab SHA-256: df94c2c675ffa787d23992588fe10b730d083023b2d22db10c6fca7f36df20b9
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=printable+pistol+targets'. This URL is presented within the document body, disguised as a link to printable pistol targets. The document also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector attack pattern.

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=printable+pistol+targets
    • http://files.hisinscriptions.com/uploads/1/3/0/7/130740066/ca085ca6.pdf
    • http://files.soulfitt.com/uploads/1/3/2/6/132695418/bemupeso.pdf
    • http://files.myfavoritehaunting.com/uploads/1/3/2/6/132682093/f9aeed63cbd3724.pdf
    • http://files.newseedspriory.org/uploads/1/3/2/6/132681698/8786987.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/4056582578.pdf
    • https://cdn.shopify.com/s/files/1/0435/5165/4047/files/gopegidexi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5912/5160/files/95797193991.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/13948052489.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/jufixirivokasumo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45292738862.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/liwisolovopevewaxakoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/zegobutoviredij.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/33622179611.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/furavo.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_off000065c4.bin
a3d642500d453b0b4cf642570418fca3a86de7cba460c04a638c74445e362002
pdf-font-stream PDF embedded font (sfnt) at offset 0x65C4 5128 bytes
font_01_sfnt_off0000773d.bin
41baace8ef11dd90e7d4726b2b0d221267757e687b3db153ffeced660dbbdbac
pdf-font-stream PDF embedded font (sfnt) at offset 0x773D 10100 bytes