Malicious PDF — malware analysis report

Static analysis result for SHA-256 05c374e41497ae4a…

MALICIOUS

PDF

43.6 KB Created: 2020-08-03 20:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9c172eefc8b2469c87c96041762dedfd SHA-1: a6687d4cbe834e3442e8931111030b02175a5c09 SHA-256: 05c374e41497ae4a88f2f9040be96fad963399d968dbdadf68831bc0e2a5c16b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.cc) which in turn leads to other PDF files hosted on Shopify and other domains. This behaviour is indicative of a link farm or SEO poisoning attack, likely intended to phish for credentials or distribute further malware. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=ielts+sample+reading+test+pdf In PDF document text
    • http://files.irishblessingscoffeehouse.com/uploads/1/3/1/4/131407315/d88c95b500523dd.pdfIn PDF document text
    • http://files.bouncyparadeboxers.com/uploads/1/3/1/3/131398244/5bab28d8.pdfIn PDF document text
    • http://files.roadrunnerkitchen.com/uploads/1/3/2/8/132814067/terot_daxax_dumidixam.pdfIn PDF document text
    • http://files.telluridepreschool.org/uploads/1/3/1/4/131482988/ede88521e.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/1/0436/9140/9558/files/75373331918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4679/5424/files/a_hat_in_time_modding_tools.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1653/1617/files/brew_install_mysql.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5892/0605/files/remobudome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/zemakajifuwarox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7840/9622/files/65401448328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8956/7650/files/48166723207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6174/7605/files/23913558911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/16290414598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/xexevuzipovutedawawajosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1955/0370/files/look_over_my_shoulder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/mitoj.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_off00006d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D54 5296 bytes
SHA-256: 04644519c17d92299a46145b4e15ac22472be9002b300c3667ba75503e9bd592
font_01_sfnt_off00007f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F42 10120 bytes
SHA-256: 396f098b5d57d733ef853c60ad0de81a685572a1cbfb1a86a8a5eb242f0b873b

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