Malicious PDF — malware analysis report

Static analysis result for SHA-256 c523745cf4187d2f…

MALICIOUS

PDF

51.7 KB Created: 2020-08-17 08:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fe2a526eb609df8b4e1517de1e89fe4b SHA-1: f26f03eb3f366aed342f9651785cb80db36ed357 SHA-256: c523745cf4187d2fec2f512f9ad4c9bf85444466f352e1300629e30e2579b8df
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=contract+bidding+process+pdf'. This indicates a social engineering attempt to trick the user into clicking the link. The document also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farms used to distribute malicious content. The presence of these links and the redirector strongly suggests the intent is to lead the user to a malicious site or download further malware.

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.cc/pify?keyword=contract+bidding+process+pdf In PDF document text
    • http://files.ridgewoodproductions.com/uploads/1/3/0/7/130776081/senegexefosoder.pdfIn PDF document text
    • http://geseda.heatonfeetfootwear.net/uploads/1/3/0/7/130738732/fubigu.pdfIn PDF document text
    • http://files.trialinnovations.com/uploads/1/3/1/4/131483371/varuniraviwipog.pdfIn PDF document text
    • http://files.atarborists.com/uploads/1/3/2/7/132740424/kenoti-zupuzives-godawakupufaso.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/1/0428/4448/7836/files/binivoramew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4683/7151/files/benedicto_xvi_libros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5812/7270/files/22481600905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/rimaposo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/tujofelijukenudukal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/zixinogomemejogipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9839/1196/files/86230624642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0682/8441/files/encyclopedia_of_computer_science_and_technology_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6360/6437/files/vosebetukejenuz.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 6

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_off00008cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB0 5336 bytes
SHA-256: 60531193b40983e880c8a8ae1fa6e14e9deda7fca7c94e4d6d855364d4ab52c2
font_01_sfnt_off00009ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EE1 10236 bytes
SHA-256: d6396ab4e80d3bf0ec06763d45f4a49a7ef97e0b727e5eacbf07b564e36b2d03

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