Malicious PDF — malware analysis report

Static analysis result for SHA-256 3637edeb9b324927…

MALICIOUS

PDF

41.1 KB Created: 2020-08-09 23:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 76e73bc6c29805cb5618746ac252472d SHA-1: 2764a3bca226b0d40d2a22a8cf082e35650b97e4 SHA-256: 3637edeb9b3249271155847471df7588f6338c82cf3bec545f3a4925d633f00b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, 'https://ttraff.ru/pify?keyword=amoeba+proteus+classification+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this malicious URL and other links, suggesting a social engineering tactic to drive traffic to malicious infrastructure.

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.ru/pify?keyword=amoeba+proteus+classification+pdf In PDF document text
    • http://files.learnwithmmg.com/uploads/1/3/2/8/132814427/xoxuvugekot_sojitide_wavejopibu_wurixazofawik.pdfIn PDF document text
    • http://files.marineconservationlab.org/uploads/1/3/0/8/130874526/zikogoleminumebew.pdfIn PDF document text
    • http://files.theswingrevue.com/uploads/1/3/1/4/131438157/ponefivuluzo-desirezazi-rorijuliked.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/1/0430/5374/4279/files/apostila_caldeiraria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7417/4632/files/manezamavixozagupiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2442/4853/files/52807622013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/gaketujegez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5308/7901/files/nosejodalomepetawetagap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0372/2398/files/nijezugetasuwowim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9481/9484/files/17748220144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3747/4466/files/20101395511.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0806/4677/files/gastrointestinal_tract_anatomy_and_physiology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/21515956720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/92424105848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3759/6575/files/86113098499.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 6

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_off00006285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6285 5432 bytes
SHA-256: f141122e0d64587757aae637d0e54827d5ce01f6c4a919a907f7193d1ac943b3
font_01_sfnt_off000074db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74DB 10152 bytes
SHA-256: 26e1bfabd328920754da64f21cee357ceeffbf84cb54dcca4d9957c0a9fbb6bd

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