Malicious PDF — malware analysis report

Static analysis result for SHA-256 37cc7d1d27e3a59b…

MALICIOUS

PDF

41.8 KB Created: 2020-08-22 21:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ddc40ddc23bb594a36d344b85c6d37bc SHA-1: 8789ee943f93f7aad7d84bcd727bcd8d3b580487 SHA-256: 37cc7d1d27e3a59b41912b2aa488505d3d69373e4ec419a8160d3fa60c196e70
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body and embedded URLs suggest an attempt at SEO poisoning or a phishing lure, aiming to drive traffic to malicious infrastructure. The ML classifier strongly indicated maliciousness, supporting the presence of malicious links and the overall suspicious structure.

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=sheridan+bed+sheets+australia In PDF document text
    • http://lavadukul.tidytimeservices.com/uploads/1/3/2/6/132680981/5344373.pdfIn PDF document text
    • http://files.highstchiropractic.com/uploads/1/3/0/8/130814161/55973.pdfIn PDF document text
    • http://gowefib.thorsonpto.org/uploads/1/3/2/6/132696067/9dc36ecc91.pdfIn PDF document text
    • http://mexofete.sarahnestiwillard.com/uploads/1/3/2/7/132740780/texinizu.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/1/0438/2274/3712/files/69502911484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2067/2409/files/tikegolemawezofug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/fefurelaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8013/9423/files/baxejoluboxowiboniw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8062/1984/files/pokemon_ruby_strategy_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0062/7363/files/tatanosurivanarusitude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2882/3719/files/40817772983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/pudolifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5710/9399/files/thinkertoys_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4973/0727/files/what_are_examples_of_maladaptive_behavior.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3461/4688/files/tupusod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/72406171571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3653/1095/files/bharat_movie_song_slow_motion_pagalworld.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/78144415721.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 8

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_off000064df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64DF 5156 bytes
SHA-256: 7b7351225319c68bd60212cd00aa4315a213bc3b6479a7b2cc03eac6309cbcd8
font_01_sfnt_off00007658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7658 10664 bytes
SHA-256: 10050103ed31f685014a72f045244bcc4c0d69b3408252cace2c0141bab40c84

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