Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1994ebe3b3770f…

MALICIOUS

PDF

42.6 KB Created: 2020-08-17 10:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c717044ead9a04744b521eb38d7b524f SHA-1: 996cf32719d6c1370cea8d6a681be73e65c2a487 SHA-256: 6f1994ebe3b3770f146f2904d009e6b4702413a85a6a1dfa5c619ab0c99c4a4c
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service at `ttraff.ru`, which is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL and a keyword suggesting a lure for users interested in productivity apps. The presence of multiple external PDF links, some benign and some malicious, indicates a link farm strategy. The ML classifier strongly supports the malicious verdict.

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=best+time+blocking+app+android In PDF document text
    • http://files.positivepyramidprogramming.com/uploads/1/3/2/6/132695354/vexiwute_fosuwodumapula_soxenadifanitud_botetejidodamo.pdfIn PDF document text
    • http://regew.holisticmommabear.com/uploads/1/3/0/8/130873791/vapemel.pdfIn PDF document text
    • http://files.transcendenttrip.com/uploads/1/3/2/6/132695629/sozivapozasuz_fuwutitonurow.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/1/0437/0199/3622/files/12476304129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6274/6517/files/yasin_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6332/8411/files/neralifadugarame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9800/3874/files/81774689690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/cardiology_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4091/3061/files/kotikonurigefavewon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2243/3953/files/guvufedam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4228/2394/files/febisosurewoja.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 3

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_off000068ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68CA 5644 bytes
SHA-256: fd77af5b842d7559f212a08917ffbbfa171304cc8a9bb980aebe955aeb25878d
font_01_sfnt_off00007bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDC 9888 bytes
SHA-256: 34ed01e32dd7022f8e3cabd9107dc043d6cadea9c3ef6e906b2eb0eef779c8e8

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