Malicious PDF — malware analysis report

Static analysis result for SHA-256 40de6647c09c7a96…

MALICIOUS

PDF

40.9 KB Created: 2020-08-14 11:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a468385c0587d5d008afa00e1ceae97 SHA-1: 8d792830bf74573f3427759fe5b4fd59521fef14 SHA-256: 40de6647c09c7a96026c0af675ed59f5b9b4b0298e6ec10b98c4ff5893dc9213
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a redirector to malicious infrastructure. The primary malicious URL identified is ttraff.ru, which is used in conjunction with SEO-optimized PDF titles to lure victims. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links, suggesting a link farm or SEO poisoning attack.

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/wb?keyword=compare%20and%20contrast%20administration%20and%20management%20pdf
    • http://joner.szejones.com/uploads/1/3/1/1/131164250/0c26280f181.pdf
    • http://files.vlkstudios.co.uk/uploads/1/3/0/9/130969997/68c09d86bad.pdf
    • http://kudeguba.saranyawellness.com/uploads/1/3/0/7/130775818/6853108.pdf
    • https://cdn.shopify.com/s/files/1/0432/0080/7070/files/pmp_braindumps.pdf
    • https://cdn.shopify.com/s/files/1/0437/3420/4568/files/17040283450.pdf
    • https://cdn.shopify.com/s/files/1/0431/6279/6186/files/57940217754.pdf
    • https://cdn.shopify.com/s/files/1/0429/1674/1286/files/37566881370.pdf
    • https://cdn.shopify.com/s/files/1/0437/8502/7745/files/mipitugezuzurojirop.pdf
    • https://cdn.shopify.com/s/files/1/0437/6746/4085/files/bard_of_blood_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6721/files/13380959782.pdf
    • https://cdn.shopify.com/s/files/1/0432/3078/9800/files/absorbing_markov_chain.pdf
    • https://cdn.shopify.com/s/files/1/0433/5704/4890/files/tifukekerewapazez.pdf
    • https://cdn.shopify.com/s/files/1/0430/4456/9242/files/zololovujufimoditunobas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.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_off0000633b.bin
8c234a65b6504e7dfd426f56185d501602ec4954797887663438c99eff8ff28a
pdf-font-stream PDF embedded font (sfnt) at offset 0x633B 5348 bytes
font_01_sfnt_off0000754f.bin
d91ba890e69122ea2b19b2403a4ab1a2655465221e87379ec73b655d5a2b7a5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x754F 9780 bytes