Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bd910b1e1611ead…

MALICIOUS

PDF

56.9 KB Created: 2020-08-27 20:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b9a080ebc78e47cddda201bfc67c506 SHA-1: ff829032a6f7307c916b780e3d8fa1702bda95a8 SHA-256: 8bd910b1e1611eadf09d30291e3fef376ea22d69cb44baff2bf5d38270133370
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic indicates a PDF redirector link to 'ttraff.ru', which is known malicious infrastructure. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, indicating the primary intent is to lure the user to this external site. No scripts were extracted from this sample.

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=dragon+age+inquisition+beginners+gui
    • http://files.studiolegalecalvisi.com/uploads/1/3/2/6/132695543/kedetok.pdf
    • http://files.upwardmvmnt.com/uploads/1/3/0/7/130738568/liwevirapixizexul.pdf
    • http://files.washington-scottish.com/uploads/1/3/0/8/130874318/8b0f395751b7b3.pdf
    • http://files.leecovet.com/uploads/1/3/1/4/131407552/zejexapeg-mezulalafa.pdf
    • http://files.whitefishtherapy.com/uploads/1/3/1/4/131407424/0c2d60a6.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1068/files/xatuxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/6647/5174/files/nogezilaka.pdf
    • https://cdn.shopify.com/s/files/1/0433/9479/3630/files/1351754249.pdf
    • https://cdn.shopify.com/s/files/1/0430/6255/8874/files/28158655236.pdf
    • https://cdn.shopify.com/s/files/1/0433/3702/3656/files/altruistic_behavior.pdf
    • https://cdn.shopify.com/s/files/1/0434/0344/4380/files/automobile_ignition_system.pdf
    • https://cdn.shopify.com/s/files/1/0431/4238/1725/files/population_ecology_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0081/4998/files/31036312441.pdf
    • https://cdn.shopify.com/s/files/1/0431/8792/9252/files/91269339775.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/kozebopawuke.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_off0000a023.bin
63e7e60a19f07e2cf504bf975a23787024b88e9492e4b3df6f27abf4f6dca041
pdf-font-stream PDF embedded font (sfnt) at offset 0xA023 5088 bytes
font_01_sfnt_off0000b179.bin
b67ad0e3ee299b95081878426f7f65462431d840291b7525f60aa6852e66d61b
pdf-font-stream PDF embedded font (sfnt) at offset 0xB179 10744 bytes