Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8f0911e070cd90…

MALICIOUS

PDF

41.9 KB Created: 2020-08-05 23:25:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c23517803039b698bb35737217573bd4 SHA-1: 4033444a9f1b0aec667ddef04d9920572e42a5e0 SHA-256: 1e8f0911e070cd90299bd01f6f85a515c265f1f748beda4b3c85d7847f03bac9
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector (ttraff.ru). The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious. The document body, though corrupted, contains the URL that triggered the malicious redirector heuristic, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=razones+trigonometricas+de+angulos+suplementarios+ejercicios+resueltos+pdf
    • http://files.grillinmagic.org/uploads/1/3/0/7/130738531/4306542.pdf
    • http://povewog.geriatricpsychiatryresearch.org/uploads/1/3/0/8/130814921/1397644.pdf
    • http://files.neighbors4christ.org/uploads/1/3/2/7/132712096/xevegigumo.pdf
    • http://files.sonoma-chanson.net/uploads/1/3/1/6/131637814/zekugev-tasagefolufepu.pdf
    • http://ladidere.etcheer.com/uploads/1/3/1/4/131482853/109501.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/zaniresakojeka.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0815/files/misenupuwiwalipakuguk.pdf
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/tibajumotekopubomajejume.pdf
    • https://cdn.shopify.com/s/files/1/0437/9846/2624/files/vomifuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12729031526.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73881495537.pdf
    • https://cdn.shopify.com/s/files/1/0432/4127/5547/files/critical_accounting_theory.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/86273277637.pdf
    • https://cdn.shopify.com/s/files/1/0438/4751/6325/files/muzakapepaxanalukorifopek.pdf
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/lefesaretefakipazeja.pdf
    • https://cdn.shopify.com/s/files/1/0431/1996/8417/files/69504859498.pdf
    • https://cdn.shopify.com/s/files/1/0433/8044/1238/files/smoke_devil_dungeon.pdf
    • https://cdn.shopify.com/s/files/1/0440/7263/2470/files/data_analysis_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0436/2846/2243/files/losonadepulebapigobox.pdf
    • https://cdn.shopify.com/s/files/1/0439/8995/8814/files/tutorial_sql_server_management_studio_2020_espaol.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_off00005757.bin
623dccf63a0108f285ce598f7c8106e084eae6be9dfb07e7440a8ee096cc798c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5757 5608 bytes
font_01_sfnt_off00006a68.bin
54ea73adfdbbd50a8fc5a4015f5709b477a0e4d16dd468d03b2a0e8d808f06f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A68 14688 bytes