Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc51a84d3a18802…

MALICIOUS

PDF

46.2 KB Created: 2020-08-07 08:30:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ffe71d569f4731d92cfd7fc97ff08e85 SHA-1: d876fa051c2ada57a35c2ff78f72c7a851a1d100 SHA-256: 1fc51a84d3a18802f9ef9edce0bae095df315d807c4e6f028d0ba37d5be448b2
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru', which is likely the primary malicious payload delivery mechanism. The document body text, though partially corrupted, includes the same lure text as the malicious redirector URL, indicating a coordinated social engineering effort.

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/wb?keyword=sinbad%20the%20sailor%20story%20with%20pictures%20pdf In PDF document text
    • http://files.museumtrustee.org/uploads/1/3/0/8/130813757/fugole-dudanalenoxum-numotise-pawuxanobopivi.pdfIn PDF document text
    • http://miwoj.snackscast.com/uploads/1/3/1/4/131453247/famiperemofetunox.pdfIn PDF document text
    • http://files.ancestorscouture.com/uploads/1/3/0/7/130775180/nuredozoti.pdfIn PDF document text
    • http://files.nvgws.com/uploads/1/3/0/8/130814674/watirepaduxisezusofi.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/1/0432/0228/1633/files/vomokene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6482/6783/files/kinava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3394/2423/files/74205749255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/cfop_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6614/6472/files/gipokukifajuwumosaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6552/3870/files/riwof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5493/0839/files/melojewojevojalov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/80220368395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jamitaribigonekadori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7424/8101/files/botej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3609/0273/files/52347120395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0081/6028/files/cub_cadet_gt2550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5444/8286/files/wusixapegapajowedopejave.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 8

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_off0000759f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x759F 5680 bytes
SHA-256: 7697d3b31864b43f6f54020e657b1697b56a72c592a778437e1a802a81d0a8cd
font_01_sfnt_off00008903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8903 9976 bytes
SHA-256: b20381f67109c8da3fdea5dca85d5ce086348181d0abb51161b27fc01800b7f6

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