Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a9e4be07cbdd778…

MALICIOUS

PDF

55.0 KB Created: 2020-08-10 09:38:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 74f061b701a68d7bc2401b451d9aaf34 SHA-1: f0c5918f7ebe14ceb4c1aac14a069f940963a456 SHA-256: 7a9e4be07cbdd778160ebdac4ee49e0147b98628c5659e2491dc520bcf3733c6
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, also contains this redirector URL, suggesting an attempt to trick users into downloading further malicious content. 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=blank+sheet+music+for+guitar+pdf In PDF document text
    • http://files.killjoy.info/uploads/1/3/2/8/132816158/444fa6d86d0810f.pdfIn PDF document text
    • http://files.moamsticks.com/uploads/1/3/2/6/132682335/096ccbbb09bdf0.pdfIn PDF document text
    • http://files.purepointacu.com/uploads/1/3/0/7/130776276/nivalaxivaki-zipala-xanenusuxikibe.pdfIn PDF document text
    • http://tusawuji.juelzofthenile.com/uploads/1/3/2/7/132740405/2012025.pdfIn PDF document text
    • http://files.learningessentialsnc.com/uploads/1/3/2/7/132740241/4934603.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/1/0436/2217/0787/files/wukibotareserukasitatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/vavifidisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2091/7668/files/teaching_writing_descriptive_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/nomenclatura_de_alcanos_alquenos_y_alquinos_ejercicios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9671/7992/files/62117607287.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2017/9864/files/risejikaxugopifakovewikof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3413/2131/files/kuxexivimakuninupavaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3126/3394/files/kidogibunowigelulan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/57549084660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5100/8671/files/8862413106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/xotutejawarujexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/29177394401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0676/2903/files/lixizalizupuwigosenoko.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81CC 5684 bytes
SHA-256: fff93205c0759333c5ba024171e3769ae683b3a93e4ceb131b7d0da70252126f
font_01_sfnt_off000094fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94FB 10844 bytes
SHA-256: 02237dec4964a581aa89514fa2af877c9a17b86c176dc9ce7484412179776236
font_02_sfnt_off0000b987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB987 16100 bytes
SHA-256: 84650fe671c70ac66f3af0994468c9b9feb42d01905b0f030d5781e095ef8e52