Malicious PDF — malware analysis report

Static analysis result for SHA-256 52d5d1da1dd355c3…

MALICIOUS

PDF

40.9 KB Created: 2020-08-06 14:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 013637f557ec16d682487cd27d089804 SHA-1: 6442733166e07a8c979fdb37b17f07841d338bb4 SHA-256: 52d5d1da1dd355c33716a70b8407e0fb9b02216877b8e0d84cc7cc4d4976bb91
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.ru. The document body, though partially corrupted, contains keywords related to epilepsy and the tool wkhtmltopdf, suggesting a lure to disguise the malicious link farm. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=epilepsia%20causas%20sintomas%20y%20tratamiento%20pdf In PDF document text
    • http://files.sybaritic.com/uploads/1/3/0/7/130740262/e96f7245aee7b.pdfIn PDF document text
    • http://files.exploremynation.ca/uploads/1/3/1/4/131437117/desezimireka-fiwarepunofexup.pdfIn PDF document text
    • http://files.catyoung.net/uploads/1/3/2/3/132302736/sirumu.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/1/0428/9835/8432/files/bewewolifokolugetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/velifer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0288/8351/files/sipuwumidalutirimuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5812/5207/files/bawixosunisomilowapef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5101/5577/files/20931567495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3689/3599/files/2000_toyota_land_cruiser_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/wopalaposilupobujat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7687/7478/files/43387009719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3273/0017/files/form_dl_44_california.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/vikizarujuwej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4484/7261/files/99569940429.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 4

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_off00005ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA6 5360 bytes
SHA-256: 04737fcb6fab812338b161584c8b849cda7746f1a730a29616049fbac0235c53
font_01_sfnt_off00006ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED6 12304 bytes
SHA-256: b3df828ecc64c7ffac92dfee1e3c0814aa4979db79b4271c68b245d82a891ec6

Open this report in the interactive analyzer, or submit your own file for analysis.