Malicious PDF — malware analysis report

Static analysis result for SHA-256 881b81a03a9fc16b…

MALICIOUS

PDF

41.2 KB Created: 2020-08-04 20:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b14f0905fc801b3c53f18f3189c1c50f SHA-1: f4f3a7061444ddbf8203f06cd4caf645fe505390 SHA-256: 881b81a03a9fc16bd362e5f14d44657b06424d3ddb09644067d89f92ea0896e1
194 Risk Score

Malware Insights

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

The PDF contains a lure related to electric cooker manuals, but its primary function is to host a large number of external links. Many of these links point to a redirector infrastructure, specifically 'ttraff.cc', which is known for malicious activity. The document also includes a large link farm, suggesting an attempt to manipulate search engine results or distribute malicious content through a network of PDFs.

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/wb?keyword=stoves%20electric%20cooker%20manual In PDF document text
    • http://files.plaincommunitychurch.com/uploads/1/3/0/7/130775561/1243776.pdfIn PDF document text
    • http://files.stannesrathangan.com/uploads/1/3/0/9/130969655/zufurabunavopor.pdfIn PDF document text
    • http://files.kccbiz.net/uploads/1/3/0/7/130738696/b673e4.pdfIn PDF document text
    • http://files.nostrings.co.nz/uploads/1/3/0/8/130874382/xemuvag_kumedo.pdfIn PDF document text
    • http://files.wildflowersfloraldesign.com/uploads/1/3/1/4/131408131/mozegenukabobabumu.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/1/0434/1088/2727/files/85335712192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9931/6639/files/12074046604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/nesavopitugunuxapudafole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/9475865735.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/ligagisedaxijusov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5274/4356/files/vbox_guest_additions_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3086/3259/files/26897715402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2656/2722/files/804181704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8737/1171/files/42309158178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49726552648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5238/1846/files/branches_of_linguistics_with_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1415/9521/files/89645353701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lorabo.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_off000062f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F6 5172 bytes
SHA-256: 1100136c70d2797b63029f817ac47c55c68f2fccf2c62de8e166d7d151a951a3
font_01_sfnt_off0000747b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x747B 10384 bytes
SHA-256: 33744e06ba5e8981837c2d123d87208e26ba2d8b15ae81a455c4dcc75ae2c9c8

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