Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5540c1251f60316…

MALICIOUS

PDF

32.7 KB Created: 2020-08-04 21:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff4037f6f4d6833d15310cb62e9b0aa9 SHA-1: 3fde257c332816fab44b3d80f0866c534ef7e2fb SHA-256: f5540c1251f60316ec1e257f4943692ffeee799618d0a1119c1e556aa87a1723
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be part of a SEO link farm designed to trick users into downloading potentially malicious files. The ML classifier strongly indicates 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.com/pify?keyword=applied+linear+statistical+methods+kutner+pdf In PDF document text
    • http://files.newskinbodyart.com/uploads/1/3/1/4/131407802/c660af80397b55f.pdfIn PDF document text
    • http://files.neekascreationsonline.com/uploads/1/3/0/8/130874595/bunexifojetimevajam.pdfIn PDF document text
    • http://files.teamacorntriathlonclub.org/uploads/1/3/1/1/131163859/7829059.pdfIn PDF document text
    • http://pudipex.specsolns.com/uploads/1/3/2/8/132814930/4915734.pdfIn PDF document text
    • http://files.thedancerswardrobeltd.com/uploads/1/3/1/0/131069744/govifofapupigufet.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/1/0429/0219/2287/files/xugaleguxojomukumeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/87664991858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/85593782128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/xazisufevikufilamazuvisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5516/9182/files/palladium_fantasy_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6832/4005/files/bewipegeni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8380/9447/files/flex_box_froggy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/wazajiruvasumojeba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/kebozagubijirugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/58474929235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4055/5676/files/rekipexuw.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: millimanquarterhorses.com 3 samples

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_off00004579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4579 5448 bytes
SHA-256: e140e5ee7e76ce22dca31c3b552cb7d9daa618a720de93c4738da221acf04904
font_01_sfnt_off000057d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57D8 8804 bytes
SHA-256: 931017335f3fba947efa7a2b2b720ac68b4b5a9600b4fe0a5b9629408f80cf37

Open this report in the interactive analyzer, or submit your own file for analysis.