Malicious PDF — malware analysis report

Static analysis result for SHA-256 b58e3561e15f52ee…

MALICIOUS

PDF

37.5 KB Created: 2020-08-09 07:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5b3c3dd8cba16a26baf6e65490998af5 SHA-1: d28eb587ebda2e801727f52425bd946af4355f79 SHA-256: b58e3561e15f52ee5085a2629419c8cb9c1a1cd19b49127afa77f4b0f4b3177a
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.ru/pify?keyword=sparepro+catalogue+pdf', is presented as a catalogue, suggesting a lure to trick users into clicking through to potentially malicious content. The document body, though heavily obfuscated, contains references to 'sparepro catalogue pdf' and the authoring application 'wkhtmltopdf', reinforcing the lure. The presence of many Shopify-hosted PDF links, while some are marked benign, indicates a broad distribution strategy.

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=sparepro+catalogue+pdf In PDF document text
    • http://files.creativitytankllc.com/uploads/1/3/1/4/131454620/voxisezetamonamonoda.pdfIn PDF document text
    • http://files.collingwoodresearch.com/uploads/1/3/1/4/131411539/xovotakemafefokog.pdfIn PDF document text
    • http://files.swbowbenders.com/uploads/1/3/1/4/131483830/586471.pdfIn PDF document text
    • http://files.arlingtonlimoco.com/uploads/1/3/1/3/131379622/lewabap.pdfIn PDF document text
    • http://files.wsespta.com/uploads/1/3/1/3/131398135/1075006.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/1/0430/8746/2551/files/moxafapoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/movizasutetawafuwasex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8256/1176/files/orthographe_ce2_exercices.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8669/1998/files/91894346273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3847/4393/files/kizegamosinuvux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/84691267266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/vupiredilelovupavuranima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6690/1148/files/wuxawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2956/9434/files/gokitebiwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1350/3133/files/46802220191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5951/9394/files/45795795700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1223/5174/files/60897415538.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51D4 5248 bytes
SHA-256: a9c72cb0f23c0d345cc02c0fc0b1d33c78f4f6d30eb0a5f02388fa8d356c162f
font_01_sfnt_off000063bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63BB 11704 bytes
SHA-256: d7c5e68e89e771afb88fb2cb1f617b2909356ba5cf2ba5161f9e6b07cf2dadf0