Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94721241afd7147…

MALICIOUS

PDF

39.5 KB Created: 2020-08-01 07:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b0f28c700864359d3c6233acb344df63 SHA-1: f0afdcab9a3e2decb62491a4d45efb4496626f9c SHA-256: c94721241afd7147cee1efe5e65f67865624c64dd8a34770961c396cc840cf3a
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a Microsoft update notification. The PDF also features a link farm, with many links pointing to shopify.com domains, likely for SEO manipulation to increase visibility. The ML classifier 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/pify?keyword=microsoft+autoupdate+2.+3.+6 In PDF document text
    • http://files.ichcnj.org/uploads/1/3/1/6/131606223/vaximemotivab.pdfIn PDF document text
    • http://files.alicefernandes.com/uploads/1/3/2/6/132681316/sasiv_fowixono_nemowuxuwedamot_pezonizuku.pdfIn PDF document text
    • http://files.ellashannon.com/uploads/1/3/1/4/131412558/runebatuletoli_sopanaf_duxaw_gakuxi.pdfIn PDF document text
    • http://files.chillicothemudcats.com/uploads/1/3/2/3/132302894/memedera_vununoxujiwuv_terabozavizo_zaxekilad.pdfIn PDF document text
    • http://files.aes-music.org/uploads/1/3/0/8/130874671/3239038.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/1/0439/2439/0056/files/30000453375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/dawusedej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/94478349767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2892/9960/files/62944014828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4434/6792/files/73649699432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9390/0958/files/51299699851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6031/3768/files/22149776779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6640/8603/files/95453525535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/kupevutaxutabekamebosejaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/16042486024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kuzizurogepibisomagin.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 7

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_off00005c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5E 5604 bytes
SHA-256: b31ba9c13d2fe1646a73da88b8e2d3b0d28970f402786d81ccc0096c0544522d
font_01_sfnt_off00006f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F88 9804 bytes
SHA-256: edcc38234ad840b974cbdfee7958d5a7dcd13915134c2e61faa071950baa2f79

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