Malicious PDF — malware analysis report

Static analysis result for SHA-256 91c23f91be9de565…

MALICIOUS

PDF

54.3 KB Created: 2020-08-19 18:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 81a8a9fad9aaa70fd2fb6748da02a1df SHA-1: 9dd60fe28b1911ec3d877ccce51e08bc5941317b SHA-256: 91c23f91be9de5658d21b257bff8993d113ebc835c4835bcf1f56d3f02c1eea0
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=badland+5000+winch+manual'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the text 'Badland 5000 winch manual', suggesting a lure to disguise the malicious intent. The primary attack pattern involves tricking the user into clicking the malicious link, likely leading to a phishing page or malware download.

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=badland+5000+winch+manual In PDF document text
    • http://nowev.lilyandlous.com/uploads/1/3/1/1/131164250/8ff8c97.pdfIn PDF document text
    • http://files.overcastvapors.com/uploads/1/3/1/3/131381259/jakewatezawajak.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/1/0436/9822/5320/files/65085393636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3042/9352/files/valotipodagibojov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1917/3029/files/52691896760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0918/5691/files/fesetabix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/social_psychology_elliot_aronson_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3785/7691/files/solving_single_variable_equations_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0455/9261/files/bandos_osrs_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/paxokopuwonofutuwabavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7496/8997/files/tesun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0739/3435/files/36069390887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3334/6719/files/79376809595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51191810805.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 4

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_off000097ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97EC 5312 bytes
SHA-256: cfa9c8e13174fdcc9477a03efbce92ad601f5572809b64b512a8c23c182c633d
font_01_sfnt_off0000a9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9DD 10088 bytes
SHA-256: 30ade81403bb884e3d24bfb0e69c3a8fdb2a8bc8eec0168059aa5ad3f55276d4

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