Malicious PDF — malware analysis report

Static analysis result for SHA-256 1791beeb391ec5da…

MALICIOUS

PDF

39.9 KB Created: 2020-08-21 18:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 36154454197e4304373733738bd6ab45 SHA-1: f82a35aedc15c74275ba68fb8fdc391c88a7c88d SHA-256: 1791beeb391ec5da0f919e068c65812fc5b0b3a1b9de1cc5cbd19417206fb02f
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.cc) that is known to host malicious content. The document body text, though obfuscated, also contains this redirector URL, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic further supports a malicious intent to drive traffic to potentially harmful sites.

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=tripartite+guidelines+on+term+contract+employees In PDF document text
    • http://zosaguw.wolfridgearchery.org/uploads/1/3/0/7/130738511/judiputelexebi_sasuxut_janusubekovogob.pdfIn PDF document text
    • http://wuwaxaku.catenajobsplus.com/uploads/1/3/1/0/131070109/lafenizoniji.pdfIn PDF document text
    • http://files.manufixed.com/uploads/1/3/1/3/131379496/7122752.pdfIn PDF document text
    • http://vomijirov.simplycrafted.com/uploads/1/3/1/0/131070161/788984.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/1/0434/2536/6165/files/26101182311.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3909/5973/files/70995338218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/76437886134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/bezedofuzidudirimubijoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/convert_fraction_to_percentage_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/88739335317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/improving_public_policy_3rd_edition_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9481/7445/files/cracking_the_millionaire_code_mark_victor_hansen.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 2

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_off00005f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F08 5444 bytes
SHA-256: 24a80f4607770a78b26db7321eae5ad7c552655e09275a1099ddafb856a9ea55
font_01_sfnt_off00007178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7178 9784 bytes
SHA-256: 6f30fc642735c156d49eb3483a21fc4c374f3ba9c9c0ace6c3312c7a104f120d

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