Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a1481affc28b18…

MALICIOUS

PDF

39.7 KB Created: 2020-08-04 05:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ee1075ed557eb5fd915a10106c655fc5 SHA-1: 0876b186779af12840708e6a2aa39076aace0d4a SHA-256: e6a1481affc28b1810b674106c3322cdda6e37dc1ebec0835001bb3b2dd79071
194 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=cfm56+5b+engine+pdf, which is identified as a malicious redirector. The file also functions as a link farm, containing numerous external PDF links, many hosted on Shopify, which is a common tactic for SEO poisoning and distributing malicious content.

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=cfm56+5b+engine+pdf In PDF document text
    • http://files.graybiel-lab.com/uploads/1/3/0/8/130814126/9885208.pdfIn PDF document text
    • http://files.sitimeline.com/uploads/1/3/1/3/131398140/gesibuzek.pdfIn PDF document text
    • http://files.michaeldobbsbooks.com/uploads/1/3/1/8/131871849/nunako.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/1/0433/7503/4524/files/pexiwirezeroluwuwuruxizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/56087510346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9041/0658/files/lurofakun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4337/2699/files/sqlalchemy_drop_table.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/85470802338.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8305/5782/files/88953264803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9685/1103/files/bridgeport_mill_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/potenamibekima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/88701483589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5880/7455/files/3719286245.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_off00005c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1A 5168 bytes
SHA-256: bf730c7344a33dc46b8bd829d3f12f3e985cac71f6030dd18b94423ecc9385de
font_01_sfnt_off00006d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9C 11132 bytes
SHA-256: 248eb9f7b89098ff0dae6b32d372e5892264cca2e8b394aa9570c6f7802be187

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