Malicious PDF — malware analysis report

Static analysis result for SHA-256 d867a9fa3f528cff…

MALICIOUS

PDF

59.2 KB Created: 2020-08-08 03:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 06bb7466b16ba72b3ccc9067d7d9ab98 SHA-1: f4df7f5647686c39b6ac5b7df9f811ec1131358c SHA-256: d867a9fa3f528cffe9f026e9b24dab437af41df65b8f3bd1f295021beb52027c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is embedded within the document body, disguised as a link related to a chemistry textbook. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to manipulate search engine results or distribute content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=chemistry+a+molecular+approach+4th+edition+pdf+online In PDF document text
    • http://files.laura-lyman.com/uploads/1/3/2/3/132302993/mosifarav.pdfIn PDF document text
    • http://files.storytellersnz.org/uploads/1/3/2/6/132682929/jibaredadi-jamosojukafo-tupasedigodiw.pdfIn PDF document text
    • http://files.jemendozalahc.com/uploads/1/3/1/0/131071067/zinokogodetij_jumasob_dudit_poroka.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/1/0430/0334/7097/files/44663585277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2681/5903/files/39117892188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/xetibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1009/6284/files/segekawakagaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5327/6574/files/63342025262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8874/7423/files/rheem_heat_pump_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9291/8947/files/75096936512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4425/7442/files/50927726398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9282/6517/files/gewixikiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6167/4133/files/fumujajokagokiviganawuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6462/3265/files/nagedupuveribodivulagubiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2834/8056/files/junifipuzufugimipajexoz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A01 5488 bytes
SHA-256: b855c5c85f35732b380253d93337de4e5e9d7cd8dcca4a8937f6ab2496ff4c6a
font_01_sfnt_off0000ac8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC8F 10760 bytes
SHA-256: 9c8fdce167e39cba9b352dea744de66848ea4037b704624d3d5f7efb35fccf64
font_02_sfnt_off0000d119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD119 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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