Malicious PDF — malware analysis report

Static analysis result for SHA-256 a894495ce0715ad3…

MALICIOUS

PDF

115.4 KB Created: 2020-07-30 09:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8575b15618cd40f793e824483f4a8222 SHA-1: cc3c1e36fd42db25038d30666a98dd1084f76afb SHA-256: a894495ce0715ad3ca347ad084a8ed898d0fcd2c45b2d539bd06325f13ddfad1
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a search query for academic material to disguise the malicious intent. While the document body contains garbled text, the presence of the redirector link and the link farm heuristic strongly suggest a phishing or redirection attack.

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=revised+inc+bsc+nursing+syllabus+pdf In PDF document text
    • http://files.bellaluceskin.com/uploads/1/3/1/4/131406749/jopubogadese.pdfIn PDF document text
    • http://files.leannegerich.com/uploads/1/3/1/3/131379456/mewivuxorimegeruzu.pdfIn PDF document text
    • http://files.broadwaysphotostudio.com/uploads/1/3/2/6/132681450/somanotek.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/1/0436/5382/4677/files/7278923939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8271/9136/files/bojijatanujadex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8625/9100/files/84927546732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/rexetagotukegitozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4252/0739/files/sogasowuzovenububam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8198/1347/files/61950417595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/xukubuziziruge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/bizasezifolisipafibosoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0266/5892/files/64636695806.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7883/5606/files/saramewom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4343/8242/files/43353528906.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 1

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_off00018232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18232 5324 bytes
SHA-256: d9ed393f6272a82d81176c85b97bc6f852e9deb4345d926d41bf02336718feda
font_01_sfnt_off0001945b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1945B 13976 bytes
SHA-256: ad0fba92c4dab38869c8d75cbd328d202bd30d189e6f773f3a933a0e20e3f9cd

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