Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b4568eade9e9ef9…

MALICIOUS

PDF

41.3 KB Created: 2020-07-31 22:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a978e03b64f22111c388e39307f782eb SHA-1: 7aee5669c65910a4cb09fa1d4c2cd6a0690ae742 SHA-256: 1b4568eade9e9ef988edcfae4c53ce1a4c8aaa52382611324f216c49c209cdb3
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=briggs+and+stratton+carburetor, which is likely used to redirect users to malicious content. The document body contains obfuscated text and embedded URLs, further supporting the malicious intent.

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=briggs+and+stratton+carburetor In PDF document text
    • http://files.guildfordsongfest.com/uploads/1/3/0/7/130740256/setegonipejor.pdfIn PDF document text
    • http://files.bensawyermusic.co.uk/uploads/1/3/2/7/132740218/kelupotamevivok.pdfIn PDF document text
    • http://files.jameschristianimagery.com/uploads/1/3/2/6/132695519/wezogedakanijep_xuzofosegi_bumilonoxuwimi_dujedi.pdfIn PDF document text
    • http://files.moderndayparablesrcf.com/uploads/1/3/0/7/130740049/zadigapuvunib-sejazole.pdfIn PDF document text
    • http://files.paulusvestment.com/uploads/1/3/2/6/132682934/2461564.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/1/0428/7044/0095/files/wopusenuxawuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2008/3612/files/botovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/zepanamejobitiwebiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7435/5351/files/46039929636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/kuwomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4101/3412/files/25794816907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8270/9160/files/2892288327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4963/2415/files/viseriworuminu.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_off000063a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A5 5264 bytes
SHA-256: b13941bfe14d6601528f42384aa9e244cf5cf8b6b907decd0de1570048acbe80
font_01_sfnt_off00007595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7595 10212 bytes
SHA-256: 9b0c95afdc04486a8ba843cf2f65d31a0b6943679173257aeea8c6a5cd3a06ab

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