Malicious PDF — malware analysis report

Static analysis result for SHA-256 405fb80e6c554e31…

MALICIOUS

PDF

48.7 KB Created: 2020-08-08 06:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cca8ae5ad56e516526089294b14ebfd6 SHA-1: c24fc084ec5b988ae6495d7effabedfc877628c4 SHA-256: 405fb80e6c554e310027d0a2e1d0cf88d973fce1b67d5e07577a857865873d1e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, forming a link farm. One prominent link, 'https://ttraff.ru/pify?keyword=angles+of+depression+and+elevation+worksheet+answers+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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=angles+of+depression+and+elevation+worksheet+answers+pdf In PDF document text
    • http://files.glamourgirlhandbags.com/uploads/1/3/1/3/131384401/c76d3ad.pdfIn PDF document text
    • http://files.kilmerschool.org/uploads/1/3/2/6/132681452/lifomuputi.pdfIn PDF document text
    • http://files.stmattsschoolcampbellsport.com/uploads/1/3/0/9/130969923/vemozutozapozesabaku.pdfIn PDF document text
    • http://files.mrbaskwill.com/uploads/1/3/2/6/132683330/b7835a20645.pdfIn PDF document text
    • http://files.hubbardlakegolfshop.com/uploads/1/3/0/7/130739974/wakufivonapotadejop.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/1/0435/6187/7665/files/3951519715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2121/9493/files/551158932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7329/7814/files/kepopepafumibogixifof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/pebutozama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4299/5352/files/patifirekugofunipisipit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/lakanurepubigemakofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7424/1183/files/73598134095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7039/7339/files/94311014038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99839510681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6241/7825/files/wafakakopefujupulumokepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/16729402498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/poxelezowifitada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/71281852240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/irrigation_engineering_multiple_choice_questions.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_off00006a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A08 5508 bytes
SHA-256: 64a9bb2203913d528792fac55ac9406ec06c738045950ff5c498e4015e57c606
font_01_sfnt_off00007cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDE 10096 bytes
SHA-256: 4b5dad342b6746981dde559195a5a08e93415785caf36e4edeb9ff7e29dc7818
font_02_sfnt_off00009f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F1B 16192 bytes
SHA-256: b91503074cdd9764477c3fa0a8703da97cbbafbaa588a6b7b62ba86e8f09d30c