Malicious PDF — malware analysis report

Static analysis result for SHA-256 c91b3478206dc330…

MALICIOUS

PDF

45.1 KB Created: 2020-08-01 05:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 08e8219e73496f22bf78b610b51c9af4 SHA-1: f6079c7b084add6f68ed57c13cdb7ef8b2aef5ec SHA-256: c91b3478206dc330ab2e761a538573d80c9880d9dc354477ffe7c324ee656f6f
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating an attempt to lure users to a harmful site. The ML classifier strongly flagged this PDF as malicious. The presence of numerous links, including the primary malicious redirector at 'https://ttraff.ru/pify?keyword=knockout+js+bind+to+hidden+field', suggests a phishing or scam attempt. No scripts were extracted, but the PDF structure itself is the delivery mechanism.

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=knockout+js+bind+to+hidden+field In PDF document text
    • http://files.exitrealtyeastpm.com/uploads/1/3/2/8/132815365/a91155.pdfIn PDF document text
    • http://files.sunnytreehouse.com/uploads/1/3/2/7/132740307/zekoxituvadaka-dosul.pdfIn PDF document text
    • http://files.karentannerart.com/uploads/1/3/1/3/131380618/6887784.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/1/0440/7610/5893/files/60849344478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/bojonufuxujivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/59127088549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2786/3464/files/sample_js_files.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/tikewikali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2480/0154/files/google_sheets_collapse_rows.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9151/6826/files/sakagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/mixuvowopoguzelimutomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4527/3251/files/89924864222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/70144406983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/volvo_s40_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/75679956805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9713/7056/files/fifoxixuvomibinovadofa.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_off000066e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E4 5052 bytes
SHA-256: 6c395f6983bc41f8c3cebad0447acc16f08f59d915aef68bc037906622c4c00c
font_01_sfnt_off0000781e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x781E 15124 bytes
SHA-256: 85d148483eb984d5665608f744fa166bc0b26e3f1b86657ee4e30b2c6fa04138

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