Malicious PDF — malware analysis report

Static analysis result for SHA-256 16efd6ee97735d75…

MALICIOUS

PDF

54.3 KB Created: 2020-08-19 09:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 974de055a709d9e2181e078bf7001d78 SHA-1: 0f12b93f2207ffffeb4ca6eadbc2fc1e653b9737 SHA-256: 16efd6ee97735d752a3187593b813eb684d60b906b58ab55defecc257bfded0a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was identified as malicious by a machine learning classifier and heuristic analysis. It contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body, though heavily obfuscated, appears to contain the redirector URL, suggesting the primary purpose is to lure users to malicious sites. No scripts were extracted, but the link farm and redirector usage strongly indicate a phishing or malware distribution attempt.

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=chord+2qute+dac+manual In PDF document text
    • http://files.therockwm.com/uploads/1/3/0/7/130738949/7427997.pdfIn PDF document text
    • http://files.richmondcountylittleleague.com/uploads/1/3/0/8/130874030/pemaleperarifime.pdfIn PDF document text
    • http://files.natashadavid.com/uploads/1/3/1/3/131398308/patati-wiselipuxi-bukajujuduv.pdfIn PDF document text
    • http://files.wun-mma.org/uploads/1/3/0/7/130776257/vabod.pdfIn PDF document text
    • http://nabipi.bodyessencellc.com/uploads/1/3/0/9/130969465/6d9c50083e66.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/1/0441/1644/3288/files/43108455706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4764/1510/files/foxigiliwogusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/54457834293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8179/files/fupazugopagozusiroxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/35039721619.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8924/8924/files/workbook_vs_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4166/8763/files/14465437060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1362/5240/files/84759093871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2906/7933/files/lujilozomovemawumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6078/1475/files/github_as_maven_repository.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/62314888774.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8258/0130/files/90581516834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2417/7557/files/mokugagoliboxemizep.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
🗂 Part of campaign: michelamclaurin.com 4 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000974d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x974D 5164 bytes
SHA-256: e5cf0d34019b9abe30824c7f9ecc59af1282a881aa3e83e243aeab3c56d75971
font_01_sfnt_off0000a8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8AE 10420 bytes
SHA-256: 51ea8c7462350af12c838b42720174c4fb94e31742c3cc8f8929aae2f980a6e3