Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9dcd0dc2c5bc7d3…

MALICIOUS

PDF

51.8 KB Created: 2020-09-10 08:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e15aaac4140a8144719718954bccbcb9 SHA-1: 14b9d6701e4b9d2c385b7640f79a9c19d7e02768 SHA-256: c9dcd0dc2c5bc7d3d80469465085338ca9524dd594f9b2567e42167954fd460a
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a potential SEO poisoning or link farm attack. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine a specific user-facing lure beyond the presence of links.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.link/wix?keyword=filmywap+south+movie+hd++2018 In PDF document text
    • http://files.cbddepotshop.com/uploads/1/3/0/8/130813931/bukogilizewerin.pdfIn PDF document text
    • http://files.thefortunatefew.net/uploads/1/3/1/6/131637055/018cf3959d8b03.pdfIn PDF document text
    • http://files.griffithdentalsurgery.com/uploads/1/3/0/7/130739415/8856254.pdfIn PDF document text
    • http://kijufux.nickwinter.co.uk/uploads/1/3/1/8/131871796/3887523.pdfIn PDF document text
    • http://files.elizafleetwood.com/uploads/1/3/0/9/130969686/4984282.pdfIn PDF document text
    • http://fijofa.hanisthegroomer.com/uploads/1/3/2/8/132814930/sekazigesekid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/21b4a7_9c53fce0c93446e79371151ccbc54e6b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a4d998_2355e8d774ca4dcca682bf3fc6e88343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2497/1936/files/zutororerikaxowuralo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/57947141096.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000757b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x757B 5832 bytes
SHA-256: d9cdaa4199a851761517f3eb03859461b3b5788c67aabddb2cea85948a5a3da5
font_01_sfnt_off00008953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8953 10188 bytes
SHA-256: 21a65db3dcfa4c61dfb243989d547b929b95bb2ae33f56d7e09fe03b64c625dd
font_02_sfnt_off0000ac54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC54 16076 bytes
SHA-256: b098da79dd067f31ba2c2b8c1c5e919600cd02ab140df2a372f8f699e4c507e4