Malicious PDF — malware analysis report

Static analysis result for SHA-256 5555754043600e8a…

MALICIOUS

PDF

65.7 KB Created: 2020-08-08 00:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2e1b2e5dc3ff69e5ecaebce3c091c8b7 SHA-1: 634000129d679914887a21f19e5dcd6f85af13c8 SHA-256: 5555754043600e8a9ba798289d6b6882b221d850b96cbaf7511c67f30064948d
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that point to a known malicious redirector, ttraff.ru, which is designed to lure users with SEO-optimized content. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document may also attempt to solicit sensitive information. The ML classifier strongly suggests maliciousness, and the overall pattern points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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=certificate+formats+pdf In PDF document text
    • http://files.wioainoregon.org/uploads/1/3/1/8/131857540/xeritemejewaj-mapof-jedul-lofufuwo.pdfIn PDF document text
    • http://files.wtho.org.nz/uploads/1/3/1/4/131437438/1f291b2c06f1.pdfIn PDF document text
    • http://files.13gfab.com/uploads/1/3/0/8/130813922/kipomipenorove.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/1/0429/2683/3823/files/lazutexiteg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0497/files/92240114506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9272/9246/files/58701941454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1656/8482/files/illegal_window_file_name.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7668/9825/files/pegatebiradimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2143/4023/files/human_anatomy_marieb_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9465/3595/files/atherosclerosis_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/xufifabekupuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/66042488775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/rituwusef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3149/3784/files/ganegabikugube.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_off0000b9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C9 5172 bytes
SHA-256: 4e9b2a9cec4638e131a85ba75cd311c882ce6245737eb4d448a04a6ad11bc435
font_01_sfnt_off0000cb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB45 15036 bytes
SHA-256: 2263fbe25ae59a4c4b382c89576f8de3b773efe3ab1bdd013f097ad1bfdbb971

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