Malicious PDF — malware analysis report

Static analysis result for SHA-256 d286fce7230146f2…

MALICIOUS

PDF

35.1 KB Created: 2020-08-01 16:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c421f9326528a39001740b9a43ec052e SHA-1: 4a61159c4832ef74b99151c72b0d7c991e026d84 SHA-256: d286fce7230146f29a8ec849d4bf63dbdf76f784c0a006d514b70c19a84ed76f
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a large number of embedded links, including a known malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=call+uncle+bob. The document body contains garbled text but also includes the same malicious URL, suggesting it is the intended lure.

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=call+uncle+bob In PDF document text
    • http://files.karlamoralesphoto.com/uploads/1/3/1/4/131452935/6469711.pdfIn PDF document text
    • http://files.sunwestsportswear.com/uploads/1/3/1/4/131453215/8701036.pdfIn PDF document text
    • http://files.ultimatwiremachines.com/uploads/1/3/0/7/130776120/pexapokigitez-tudemeveli.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/1/0429/6438/5951/files/pimedezejifosokekotitida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/nepudadokonapuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/zojaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/94854679917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/67372814497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0749/0717/files/43310261407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1537/0912/files/81839868416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4607/5554/files/gikevigezufujiwetije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0809/7436/files/77601139313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/98869956481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/21120004497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xamunodobesezuwenetubaf.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
🗂 Part of campaign: corinne-a-michels-phd.net 4 samples

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_off00004e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E52 4564 bytes
SHA-256: 95baafdce2423ea27e65af3387f6daa3b5c0410b59c1f070b4b5f84edae55c4c
font_01_sfnt_off00005de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE8 10100 bytes
SHA-256: 93a55dadd2fc5367af7aefe80ddf234bb33775c508731ff88be16e794ea9c228

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