Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb781fc03442732a…

MALICIOUS

PDF

44.9 KB Created: 2020-07-27 05:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c2578412022e42d81ce9216c36a49bde SHA-1: 5ac4f7fe621fa447b973dbd572fbe43b0e3d785c SHA-256: cb781fc03442732ac607348401ad81847195ce3d6e2f47da9a0ddde31af6199c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains numerous embedded links, a technique often used to obscure malicious destinations and engage in SEO poisoning. One critical heuristic identifies a link to a known malicious redirector, ttraff.ru, which is disguised as a free jigsaw puzzle template. This suggests the primary goal is to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting.

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=jigsaw+puzzle+ppt+template+free In PDF document text
    • http://files.veteransfurniturecenter.org/uploads/1/3/1/3/131383771/busul.pdfIn PDF document text
    • http://files.atlantikwall-museum.nl/uploads/1/3/1/8/131856072/3503593.pdfIn PDF document text
    • http://files.othellogrowsupplyllc.com/uploads/1/3/1/6/131636914/vugaguwareleno.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/1/0432/7748/4196/files/28316181878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4026/8711/files/91909119536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/sozefudim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3492/6495/files/firoxuvamapikaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/79688514312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/depome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/31768480563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5678/3772/files/43558875592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4933/7500/files/54233346175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0925/3282/files/dipixasazejopev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/33465675432.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 5

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_off000072f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F1 5016 bytes
SHA-256: e5f69e993328c83c2f2d89f9d173476335bdbc25a9db859d69347ce51ff8984f
font_01_sfnt_off00008423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8423 10112 bytes
SHA-256: dbb6d67f88777d7fa947297cd12953a21082d34ec705d683e1bdb53a3eaca799

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