Malicious PDF — malware analysis report

Static analysis result for SHA-256 1377e739eef20727…

MALICIOUS

PDF

49.9 KB Created: 2020-07-30 09:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f2ba290c7db1629c3c23bf50c99b79f7 SHA-1: 789d8635a09be9d57bb4891c1d02515e77700b14 SHA-256: 1377e739eef207274b4785c0e8e0cdf7551f985eaedc455e69cee3436d31a508
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. This indicates a likely attempt to lead users to phishing or malware download sites under the guise of providing a technical document. The ML classifier also strongly indicated maliciousness.

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=unf+bolt+tightening+torque+chart+pdf In PDF document text
    • http://files.horseplayandharmony.com/uploads/1/3/0/9/130969935/5ae28c8d68bd.pdfIn PDF document text
    • http://files.curetypeone.com/uploads/1/3/1/3/131380121/dadf492e7ec13e.pdfIn PDF document text
    • http://files.cookingwithkoko.com/uploads/1/3/1/4/131437722/4518383.pdfIn PDF document text
    • http://files.copybyvan.com/uploads/1/3/0/9/130970022/5826419.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/1/0435/4228/2399/files/dobiloxojaxetosubuwabuder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7086/6087/files/wufemewosofudiluteleviwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3113/4365/files/sipotirimajirajivobolip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1828/8285/files/62121441847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3298/3205/files/34085617387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/94641699953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/1971564304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/nesujolofamezisizewokikel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/nobofatilisosubived.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8439/8246/files/34839137732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7020/1760/files/gofagivuvesokera.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACE 5380 bytes
SHA-256: f704098644bba636ff7cf6e107df66012605e4bef77b3f8077278d8280d7503f
font_01_sfnt_off00008cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF9 14572 bytes
SHA-256: 80edcbe0090fcffcc3b26c1b1273def2569c8caacacd190ece85769f49b66a7b

Open this report in the interactive analyzer, or submit your own file for analysis.