Malicious PDF — malware analysis report

Static analysis result for SHA-256 204776f6e615b7d6…

MALICIOUS

PDF

43.3 KB Created: 2020-08-23 02:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a4fc2259449140798d6252ae616e448e SHA-1: 7acf62c115c3d1d6a78b1bdba50becae6cff57ca SHA-256: 204776f6e615b7d6c8e3952a5e32fcce03b422c7d0ff4d1c56bcf4bb947950ab
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are part of a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The primary attack pattern involves redirecting users to potentially harmful sites.

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=physical+constants+nist+pdf In PDF document text
    • http://files.atrimonta.com/uploads/1/3/1/8/131856706/af05c12b73e2b.pdfIn PDF document text
    • http://files.acollierastro.com/uploads/1/3/1/6/131607053/rovosiviwuxazum-rowemonedadix-futeja.pdfIn PDF document text
    • http://fomopuvu.yachtrockmiami.com/uploads/1/3/0/8/130873951/3c8e2f10d697433.pdfIn PDF document text
    • http://jezav.fcchristianchurch.net/uploads/1/3/1/8/131871980/2401cecb.pdfIn PDF document text
    • http://pofadiva.jwhitneyart.com/uploads/1/3/0/7/130775565/2726583.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/50326835090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53262414385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2674/1405/files/7467005140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/13025415753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0877/7637/files/2641183727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7765/4942/files/85609017488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1770/5371/files/945355743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/51046965715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3217/5014/files/jipeporalokamesokala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0722/1658/files/mexufudamabezalibido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7318/3637/files/76469977224.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF3 4920 bytes
SHA-256: 2c83e20da87294bdb0ccba76ab82feaedbaea645e0c49f3354a03a3dd9c09e84
font_01_sfnt_off00007095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7095 9844 bytes
SHA-256: 7bfe32d74ae29aca700d410808d6a7e9736f32c4ff950b307f6fef1b6c304e8e
font_02_sfnt_off00009242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9242 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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