Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c4903faf96d79c3…

MALICIOUS

PDF

45.7 KB Created: 2020-10-03 21:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8bf249679f79559777e1212af8d3a4e0 SHA-1: 0ea1505f3451d6af83f9267e79ba7015c19f701c SHA-256: 8c4903faf96d79c3491935d959584d441adb6c31ab28f622a4d847222de00bb8
194 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to hotel check-in times and URLs, suggesting a lure to a phishing or scam page. The primary malicious indicator is the redirector URL, which is designed to lead users to further malicious content.

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.cc/pify?keyword=sonesta+es+suites+flagstaff+check+in+time In PDF document text
    • http://gotuxu.sophiesparks.com/uploads/1/3/2/7/132710784/togol-wukijuk.pdfIn PDF document text
    • http://files.americanfoursquare.us/uploads/1/3/2/7/132740218/majibomavapakabopi.pdfIn PDF document text
    • http://files.sukiscaninerescuecrew.com/uploads/1/3/0/7/130775398/nivenezoru_pirul_vinego.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://uploads.strikinglycdn.com/files/352a4c2d-08e8-41f5-baef-99cbc13dbaa9/tuzidofavelijuvopatuja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65acc80e-058e-4ffd-8724-88db13fa6e9c/32926108638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f836501-9b22-485e-ad1f-c549841513ea/2362384578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c970269-903c-486f-a6fd-b799700715e4/91091356330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ce57769-b821-4223-aa0c-fdc66592e257/vadekivafijazapiwexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19000073-a861-4d70-b517-a924d6d61f5b/38312085615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dcc7ad0-5408-4ca6-b87c-40e2be7dcaa0/97622768587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ecce8e5-8924-4693-bc8d-b0243d47168f/kodepajebutajukaxoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc4f27ce-54a9-4cef-89c6-47321e7dd759/jomen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c922011d-31e3-4305-93a3-c57388dcb673/31141902611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e3aeea8-761f-4a7e-95e3-9128a4a8d661/zeped.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_off000068da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68DA 5248 bytes
SHA-256: 2592ada88f8c8ae59ada91df6c406d35440110cfba013461a27ca2d030ce0ae4
font_01_sfnt_off00007a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8A 9620 bytes
SHA-256: 67cb60a4eb2dc32c423c89dee82140e57d651c3ddffe77b0f495c9248f64a8a5
font_02_sfnt_off00009b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B6C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3