Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d39e21b4f207aa3…

MALICIOUS

PDF

38.0 KB Created: 2020-08-24 01:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 591f90aa1237cc7b14886252b01c6c2d SHA-1: 46531f0f596bd8e7ff8f87d1b2472ce9f35fe360 SHA-256: 8d39e21b4f207aa3a43be67d0f8306e1fe298162bd300ea2068f746b0a4f1058
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=feasibility+study+template+excel+free'. This URL is presented within the document body, suggesting a social engineering lure to trick users into clicking it. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages. The file type and the nature of the lure suggest a phishing or scam attempt.

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=feasibility+study+template+excel+free In PDF document text
    • http://vuvur.missingpersonsrv.com/uploads/1/3/2/3/132303354/598715.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/1/0435/2756/9576/files/11303760809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8158/1223/files/it-_ebooks._info.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2286/0966/files/40049395327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1757/6354/files/sorikepovorozejibu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0732/7904/files/minecraft_guns_texture_pack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6068/1109/files/51924903893.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1373/2512/files/bewawesaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1003/0748/files/ccna_cisco_certified_network_associate_study_guide_richard_deal.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 7

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_off000055ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55EE 5568 bytes
SHA-256: 2d3d0b42874b1e3941ca637a7f083929451f6c376d7abb009f27a14428a64f43
font_01_sfnt_off000068c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68C6 10228 bytes
SHA-256: 3159f558c4ea54d87482cbc8e2b3c89709725ffd7cc9fd0f63b1e012de6d2d84

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