Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f273aeb9ec9470d…

MALICIOUS

PDF

33.9 KB Created: 2020-08-17 01:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d6787d8fcf2a639d89d0c930e2f80e02 SHA-1: 19330f115d02735b47428245363b224d281e2acd SHA-256: 4f273aeb9ec9470dc6d1f66a8c6ef3d8b3897405f041a0c06bb9bdfc67ac4f3e
194 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm or SEO manipulation, with numerous embedded URLs pointing to external PDF files. One of these URLs, 'https://ttraff.com/pify?keyword=mp+board+marksheet+hd+image', is identified as a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body contains garbled text and embedded URLs, further supporting the malicious nature.

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=mp+board+marksheet+hd+image In PDF document text
    • http://files.tericawright.com/uploads/1/3/1/8/131857920/wozojego.pdfIn PDF document text
    • http://files.fantasticfoamparties.ca/uploads/1/3/1/3/131383318/73ac8b35.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/1/0433/6150/1334/files/zakizejeliruwajufulozawis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2553/8973/files/5e_player_s_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/38465888800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6213/1869/files/rifujumetif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/pogowuxabiwawudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7206/1591/files/xilemakuvelafagobuwap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/91961207335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1697/7559/files/49375394044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5982/9149/files/64430327661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1748/3934/files/ripasosujisobagukovuvesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/puvazaxewofimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/zidokedewijosugox.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_off00004524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4524 5552 bytes
SHA-256: a1d249f1722865423463b5feaa0285db55078355e8bb86ffb6a9987dd80154f9
font_01_sfnt_off000057dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57DD 10380 bytes
SHA-256: 5300b750dc9fcc1c238303397abcca9c362c3e1aae90b60cba5da97ece3d6b43

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