Malicious PDF — malware analysis report

Static analysis result for SHA-256 421e6f6ec661f69e…

MALICIOUS

PDF

47.9 KB Created: 2020-07-30 12:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 46b6e85f914daa4e2d9399e788aeb40f SHA-1: 736ba149b9e8227c2cb99eb18952f676464b5398 SHA-256: 421e6f6ec661f69e620fe5c150862830a003c3df38782ef06595452e8b6428e8
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, suggests a lure related to statistical tools, likely to entice users to click the malicious links.

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.com/pify?keyword=statistical+tools+for+data+analysis+in+research+pdf In PDF document text
    • http://files.anaffairtoremember1.com/uploads/1/3/2/6/132695942/d8103f14.pdfIn PDF document text
    • http://files.antoniabehan.com/uploads/1/3/2/6/132682639/49ffaa.pdfIn PDF document text
    • http://files.citybeadschicago.com/uploads/1/3/1/4/131410094/jugufudaroju_pemuxizitezo_nalos.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/1/0429/7195/5351/files/vukurorowunezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/rotoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5684/8282/files/bolitutonemulewav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2423/6199/files/levefozum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4020/9056/files/22037188729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9827/4978/files/joliwer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/xezonapofozozaxerax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6709/7756/files/99703140998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0441/2583/files/91025668242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wijabogose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1949/9682/files/2750145725.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 3

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_off00007d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6E 5236 bytes
SHA-256: 2660cc2a439feaf4edbbbba24b962897dcc99379a0ff3925a7496988538e5f91
font_01_sfnt_off00008f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F20 10120 bytes
SHA-256: f07d3b6830af1ea2b56a1b4ba318fd3795c52e9ce33df8d2f97a43feb3df267d

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