Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c6da8d2d90553a…

MALICIOUS

PDF

48.7 KB Created: 2020-07-31 12:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ed7b9565bcd969bf6fe2ac694e51c777 SHA-1: a135eeb5f671ade6e18b9213faa839595de2342b SHA-256: 99c6da8d2d90553a0fecd2eecc3cb6e06013d31f0040cb9421846fb802ed0ce8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

This PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to "bass booster circuit diagram pdf". The primary attack vector appears to be directing users to malicious sites via these links, likely for further exploitation or credential harvesting.

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=bass+booster+circuit+diagram+pdf In PDF document text
    • http://files.frogpigpug.com/uploads/1/3/1/4/131436967/1825476.pdfIn PDF document text
    • http://files.wildcatmotorsports.net/uploads/1/3/2/7/132710654/b82bcab46aabf9.pdfIn PDF document text
    • http://files.clarencecoastdbclub.com.au/uploads/1/3/0/8/130874482/vurivemen.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/1/0434/7556/6752/files/palutowamogiwakeretemefez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5825/6286/files/wovit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0524/6631/files/8851258991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/taxojovuxeniwopipak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7784/3609/files/katiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8638/8136/files/nozumubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/veloduzosutokerapukirore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3275/3829/files/witomumipagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/21553304110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1438/8888/files/2093518526.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/58174971460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2776/7206/files/64385206105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9138/5758/files/talevusisolalilarifod.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_off00007f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6C 5408 bytes
SHA-256: 7961a6f3aa683df108d6fd8ee3c4ab5aaaf4a754064ff3e9a7a1319090c2757d
font_01_sfnt_off000091d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91D2 10468 bytes
SHA-256: 5e11b363366ffe5c28713f6efce54d947d0cd7a52d93b90e99cf48afc8082358

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