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) First seen: 2026-05-09
MD5: c23517803039b698bb35737217573bd4 SHA-1: 4033444a9f1b0aec667ddef04d9920572e42a5e0 SHA-256: 1e8f0911e070cd90299bd01f6f85a515c265f1f748beda4b3c85d7847f03bac9
194 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 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=razones+trigonometricas+de+angulos+suplementarios+ejercicios+resueltos+pdf In PDF document text
    • http://files.grillinmagic.org/uploads/1/3/0/7/130738531/4306542.pdfIn PDF document text
    • http://povewog.geriatricpsychiatryresearch.org/uploads/1/3/0/8/130814921/1397644.pdfIn PDF document text
    • http://files.neighbors4christ.org/uploads/1/3/2/7/132712096/xevegigumo.pdfIn PDF document text
    • http://files.sonoma-chanson.net/uploads/1/3/1/6/131637814/zekugev-tasagefolufepu.pdfIn PDF document text
    • http://ladidere.etcheer.com/uploads/1/3/1/4/131482853/109501.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/zaniresakojeka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5127/0815/files/misenupuwiwalipakuguk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/tibajumotekopubomajejume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9846/2624/files/vomifuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12729031526.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73881495537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4127/5547/files/critical_accounting_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/86273277637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4751/6325/files/muzakapepaxanalukorifopek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/lefesaretefakipazeja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1996/8417/files/69504859498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8044/1238/files/smoke_devil_dungeon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7263/2470/files/data_analysis_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2846/2243/files/losonadepulebapigobox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8995/8814/files/tutorial_sql_server_management_studio_2020_espaol.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5757 5608 bytes
SHA-256: 623dccf63a0108f285ce598f7c8106e084eae6be9dfb07e7440a8ee096cc798c
font_01_sfnt_off00006a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A68 14688 bytes
SHA-256: 54ea73adfdbbd50a8fc5a4015f5709b477a0e4d16dd468d03b2a0e8d808f06f8