Malicious PDF — malware analysis report

Static analysis result for SHA-256 79fe758fe75f58e7…

MALICIOUS

PDF

69.8 KB Created: 2020-08-07 15:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 05cabb1b51a1ad78ac38d6522b6c08cf SHA-1: f5b504f588e7b3545e4a840aef8c4c0913950b4e SHA-256: 79fe758fe75f58e7d3c2f5b9ce811113310868970730f28443607fd7e96ef1fa
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm designed for SEO manipulation. The primary malicious URL, https://ttraff.ru/pify?keyword=can+calibre+convert+pdf+to+kindle+format, is identified as a redirector. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to trick users into clicking it for a purported free download, which is a common phishing lure.

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=can+calibre+convert+pdf+to+kindle+format In PDF document text
    • http://files.specialnation.org/uploads/1/3/0/7/130775228/6c395ac70421.pdfIn PDF document text
    • http://files.caraday.me/uploads/1/3/0/7/130740173/6996428.pdfIn PDF document text
    • http://files.galmeychurch.org/uploads/1/3/0/8/130874244/wetewitegoko.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/1/0436/6221/3273/files/dupitutaliniv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/vexet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/traumatic_brain_injury_journal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/wakaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7318/1598/files/loresuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2225/3208/files/certificate_of_service_icai.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3748/2405/files/96401725420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6006/7480/files/lijuzumisezonoxezoketil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93336639176.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 2

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_off0000cb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7A 5292 bytes
SHA-256: 2a2e9336ac61ac0ab049f64516a0892a8bb198b28015cec02e7d0e04f0f640dd
font_01_sfnt_off0000dd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6A 13752 bytes
SHA-256: dbd62487ba6f646503d418b64834d665fc540368721bc4450a2f924a56c5020b

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