Malicious PDF — malware analysis report

Static analysis result for SHA-256 c86cfd9ebdcd6871…

MALICIOUS

PDF

73.4 KB Created: 2020-08-05 05:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 535f325fc895c99af74746d67ab1c0a2 SHA-1: 784a6f97ab26312883cf3cf2d49aa65e4f7e300c SHA-256: c86cfd9ebdcd687197e9d93ec61cecc24d9d90fd0290533a3713efd948368657
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wb?keyword=circulatory%20system%20worksheets%20for%20grade%209'. This indicates the document's primary purpose is to redirect users to a potentially harmful site. The presence of numerous external PDF links, many hosted on shopify.com, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector. No scripts were extracted from this sample.

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.com/wb?keyword=circulatory%20system%20worksheets%20for%20grade%209 In PDF document text
    • http://files.bellvillerent-all.com/uploads/1/3/1/4/131438708/f627180b.pdfIn PDF document text
    • http://files.chardoncommunityactionteam.org/uploads/1/3/1/3/131384018/pugotut-newifuniz.pdfIn PDF document text
    • http://files.crcs.bc.ca/uploads/1/3/0/7/130740612/0c7e7583.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/dijudakikugip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/99147137967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/panokomesabubosapuzeba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/82913661959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0654/8377/files/nascar_games_2015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6897/1418/files/jujuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7546/9473/files/virubokotaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/35410863071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7967/1718/files/jukufavurivewen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/65801782318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/79355721849.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/44673525337.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6896/2469/files/tukirozikusufibutuxibokos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD349 5648 bytes
SHA-256: ab9d72a3992fe10f75ba7ca6d9294e728be9d83b7f916899e0714153e1e328eb
font_01_sfnt_off0000e69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69A 10272 bytes
SHA-256: 66e8177cd211f9fca10b17d0516596bfcc5590a20d4abb6ec27c200a279fb136
font_02_sfnt_off000109b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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