Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f443ac7f34c28f1…

MALICIOUS

PDF

45.5 KB Created: 2020-08-12 04:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 47d6030bebeff1427238fa0bae51f3c5 SHA-1: 8ae219126d770a650ace1e1051487b2891a14adb SHA-256: 9f443ac7f34c28f1c58d8784c9a65c7cba7067ea9d089e90fdf6e1a1b586457e
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is part of a link farm. The document body, though heavily obfuscated, contains text that appears to be a lure for downloading a PDF, further supporting the malicious redirection attack pattern.

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=catechism+of+the+catholic+church+pdf+2020 In PDF document text
    • http://files.shadyblueamstaffs.com/uploads/1/3/1/3/131384380/xirodoxexu-fewek-rorudubof.pdfIn PDF document text
    • http://files.goldendinosaurs.com/uploads/1/3/1/4/131437806/kemuniwutasumab-letuwosawadati-tokugovulal-vubuwekevofusaz.pdfIn PDF document text
    • http://files.warrickchamber.org/uploads/1/3/0/8/130814205/817f37e9aa58.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/1/0428/8518/5702/files/83084038098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/pakogobemixakogasidaluv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7420/7387/files/49111001183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6195/9073/files/56129211980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/ginobajikobufin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7248/6564/files/studies_in_pessimism_schopenhauer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/romugalagunogevagupap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8960/8360/files/sobejovipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/88095015422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/notukojaxamafadij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/8301/7895/files/50608100115.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_off0000715a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x715A 5572 bytes
SHA-256: 3005ad687b1658ddc03e9d7526c65647ab16b171554450be295bde1bc85ae62a
font_01_sfnt_off00008423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8423 10820 bytes
SHA-256: 657c140b79fcda10fc5ff8396a3becceda7ba23ae2720e0b62a7c595e9310d38

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