Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc20a4df03e43fe…

MALICIOUS

PDF

57.7 KB Created: 2020-08-03 15:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00f0e876ada41a671abed6f12a9150a0 SHA-1: 10b72f327a68dd883c6ac459e174f7bc4617166f SHA-256: dbc20a4df03e43fe7d3337950be5dc9aaac415499e44714cbb3e32f4cc035021
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is embedded within the document body, disguised as a search result for an academic book. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack pattern involves luring the user to click the malicious link, likely leading to further compromise.

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=applied+psychology+in+human+resource+management+8th+edition+pdf In PDF document text
    • http://files.spiritfireretreatcenter.com/uploads/1/3/1/3/131398129/vutesopatobutimoze.pdfIn PDF document text
    • http://files.thanhthanhphoto.net/uploads/1/3/1/4/131452794/vawasexipoged.pdfIn PDF document text
    • http://files.priorityenvironmental.ca/uploads/1/3/2/7/132740415/poturowinu-pepurefeme-zomoxiru.pdfIn PDF document text
    • http://gegaveji.haywardfitnessfanatics.com/uploads/1/3/1/4/131454106/jopagodekavonefe.pdfIn PDF document text
    • http://files.rfgamebirdsrawpetfood.com/uploads/1/3/1/6/131637150/zevuxefe-xowakuw-rogalime.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/1/0428/4655/2227/files/23649915953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9148/3041/files/44424532842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72890356131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/mortal_kombat_nes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4774/6710/files/sawase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4931/1646/files/22666220191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7610/8956/files/56079071110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/tokopetevakew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lewajoranuputefikilos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/60555171496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/futilobodilewojowivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5946/8701/files/96841573874.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_off00008fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE3 5852 bytes
SHA-256: 7ded2aae704a3903461c0801c09de0b64794a72ca6c5e9e8fcb08fdbe7540a19
font_01_sfnt_off0000a3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3AB 17284 bytes
SHA-256: 8506f3b3d281412ef6cab8070bc7cc5851c0ec88cb8ff84d256ec9384c6e3dd7

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