Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c177a236bb12905…

MALICIOUS

PDF

48.9 KB Created: 2020-08-13 02:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 66cba0697229cada214daf1d44e7349c SHA-1: e416548143ab842ed31dde8307f15a3b83066478 SHA-256: 4c177a236bb12905245345249b41b78a8e498f69307a387ce5b652574d997f78
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a primary link pointing to a known malicious redirector. The document body, though heavily corrupted, contains text related to 'radiographie du genou pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise malicious content. The presence of a link farm and a redirector indicates an attempt to lead the user to a malicious site, likely for phishing or malware distribution.

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/wb?keyword=radiographie%20du%20genou%20pdf In PDF document text
    • http://files.downtheroadfarm.com/uploads/1/3/1/4/131406288/9249d752b09.pdfIn PDF document text
    • http://files.jlwarfieldministries.com/uploads/1/3/1/8/131858287/5173616.pdfIn PDF document text
    • http://zetiso.waterloogutters.com/uploads/1/3/0/8/130873826/sowopupuzepere.pdfIn PDF document text
    • http://files.kellyskylefiles.com/uploads/1/3/1/4/131453146/xebuw.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/1/0428/1391/5303/files/lomunewawuvexatomazibux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2034/4731/files/13976322909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4155504299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3430/3912/files/kafiwenib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0309/1876/files/la_la_land_another_day_of_sun_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/chevy_truck_steering_column_parts_catalog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/bumoxegukaxutemow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8998/4674/files/63884382120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7064/4631/files/18640766643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7780/2911/files/dopojobixi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2087/0044/files/95937534348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/6542674588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/xagibotineloginulazodi.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000748c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x748C 4900 bytes
SHA-256: 9545ebe35073194e39579d9ee389fce8bb6aefcd338ec6301e0c7254138a86eb
font_01_sfnt_off0000852a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x852A 10368 bytes
SHA-256: 5e29250d3efdd91ab77c275ff68d821a3854cb12a4e8cb720c1bfbab1f90a535
font_02_sfnt_off0000a891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA891 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3