Malicious PDF — malware analysis report

Static analysis result for SHA-256 dac6e772cdf11809…

MALICIOUS

PDF

40.0 KB Created: 2020-08-08 15:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 40b93b805aa2db62021068a094fef153 SHA-1: d8d1cc984afa42fe21889f848e62861f00f50018 SHA-256: dac6e772cdf11809e9c35fbda45cf9a589f2ca16d66c2155d18f80946d11f553
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, masquerading as educational content, which is a common lure for phishing or malware delivery. One of the primary links, 'https://ttraff.ru/pify?keyword=solving+radical+equations+algebra+2+worksheet+pdf', is identified as a malicious redirector. The file's structure and the presence of many external links suggest a link farm or SEO poisoning tactic to distribute malicious content.

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=solving+radical+equations+algebra+2+worksheet+pdf In PDF document text
    • http://files.wolvesdenranch.com/uploads/1/3/2/6/132683000/d1013611069702.pdfIn PDF document text
    • http://files.prestigesis.com/uploads/1/3/1/4/131408970/427911.pdfIn PDF document text
    • http://files.johndancerviolins.com/uploads/1/3/0/7/130738548/37107cb01fd24b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9900/4827/files/60712603282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9376/7832/files/personal_pronouns_worksheet_grade_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4402/7038/files/8881662747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8130/2167/files/70850276343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5465/1799/files/zetus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/pelowixag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8312/8214/files/94030571879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/13319765132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/saxopipirolikemi.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 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4725 6016 bytes
SHA-256: d067b927467b9c31295a9847158bfad0e286b8639ccadeaee460313623731f59
font_01_sfnt_off00005b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9A 12896 bytes
SHA-256: 3fcef14dbaa9e8e104ba45418aa5bd7798b1d54ee5b7b5754f01bd60b8d49bf6
font_02_sfnt_off000084b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B0 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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