Malicious PDF — malware analysis report

Static analysis result for SHA-256 6244c679fe0a932d…

MALICIOUS

PDF

38.8 KB Created: 2020-08-03 18:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9b41a386a76206a7e546bbd36360e091 SHA-1: b699f46ea9aa8d5e096af5816edb83b76027432f SHA-256: 6244c679fe0a932dc2823ccf215635775514db5dc4a51357acc6949c505d2dae
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector. The document body and heuristics indicate a lure related to 'reciprocal trigonometric functions worksheet answers', designed to trick users into clicking the malicious link. The ML classifier strongly supports the malicious verdict.

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/wb?keyword=reciprocal%20trigonometric%20functions%20worksheet%20answers In PDF document text
    • http://files.skipcoryell.com/uploads/1/3/0/9/130969498/levezu-fisuzevopo-kufagaxisulojo.pdfIn PDF document text
    • http://files.adidulza.com/uploads/1/3/2/6/132695257/9113320.pdfIn PDF document text
    • http://files.gtcwomen.com/uploads/1/3/1/4/131453917/pibof.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0431/6246/8516/files/23727967444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2610/1925/files/80502190156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5164/6119/files/discord_syntax_codes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/dorejuzujinazevijaxef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/45662004185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/roxopomukopiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3123/0624/files/minecraft_xbox_360_parkour_seeds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/10755510187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/30122708905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49839171509.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 2

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_off00004faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FAF 1968 bytes
SHA-256: ca460df6ebc41b5f142c2ef0dcb21ca8272a6fbd7d004fa3c2e4c25d41f43b5e
font_01_sfnt_off00005868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5868 5592 bytes
SHA-256: 1ad1a40ba6f46aa1cd3a21bbe761a6c43ea61ab53cfdfd1809f2e99b93facf06
font_02_sfnt_off00006b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B60 9956 bytes
SHA-256: 10f7b1cce844452ff9f37e23fd3ae1c743319d06b2556eeb4d3c53bdbbe4d8d4

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