Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5c1fb18c1aee44e…

MALICIOUS

PDF

46.7 KB Created: 2020-08-07 08:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7244c7da04985940b3107d92b5ab542a SHA-1: 6f9786844c034f92545a2222794432c589e167af SHA-256: a5c1fb18c1aee44e4d12581a65fe02618cefa0521c5cc38aa591e1d912e20941
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The document body text, though partially corrupted, mentions 'Convert pdf to word desktop software for pc registration key', reinforcing the lure. The primary malicious URL is https://ttraff.ru/pify?keyword=convert+pdf+to+word+desktop+software+for+pc+registration+key, which is flagged as a malicious redirector.

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=convert+pdf+to+word+desktop+software+for+pc+registration+key In PDF document text
    • http://files.365transportation.com/uploads/1/3/1/4/131406520/9a3a9d816f7e.pdfIn PDF document text
    • http://files.churchbestpractices.org/uploads/1/3/1/4/131437085/zakepexur.pdfIn PDF document text
    • http://files.threadpaint.com/uploads/1/3/0/8/130874422/2128282.pdfIn PDF document text
    • http://zozuragow.bluecloverrabbitry.com/uploads/1/3/0/8/130814229/vipogupisofiritave.pdfIn PDF document text
    • http://files.annscleaningllc.com/uploads/1/3/1/4/131406751/winotaginuji.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/1/0429/3525/5203/files/21497728770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/garul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/waxelevaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/81601086080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4280/6680/files/84178942508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/purigijozexuvarisuwikig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4816/3738/files/70942742673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/76496758254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/37067640802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1601/9355/files/30933780289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/81762297253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/25998474360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sikotifukiv.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_off00007373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7373 5512 bytes
SHA-256: b602be2b348ae20e142015071c900ba1c4b9eacb61824d97b2ba353ff41a99a3
font_01_sfnt_off00008663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8663 11592 bytes
SHA-256: b2d05f72653e07cded3b7fde7d9a6a7fbb25692ee70200058ca2e5c784f41060

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