Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b84b38beb34a7d6…

MALICIOUS

PDF

46.4 KB Created: 2020-10-31 03:29:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 32ea4817a9d262ca8a502cb1a445bbac SHA-1: 5ff82d75f0f1383eccb2b79ffe38b73d56b74e4c SHA-256: 9b84b38beb34a7d68dd71a7ce9966fb30fdd700890f22f62b504702e450ecc89
194 Risk Score

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/123?keyword=great+pyrenees+price+puppy In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f8e1d134ccf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418993/normal_5f9a1c9804d75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381528/normal_5f9c992cae82a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f8e7b83ed097.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403276/normal_5f95f80ad9505.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f9884d44903b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f885c7d9fb0a.pdfIn PDF document text
    • https://jadekida.weebly.com/uploads/1/3/4/3/134349878/lotipovabezo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wonoti/28703889735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dcc8586-eeb9-420a-bc70-f58cf32c5f1b/scotts_riding_mower_bagger_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54040fde-f3d2-4573-85c7-400ef8fbe51a/41376130651.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/corflex_knee_brace_stabilizer.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_off000060c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C2 5028 bytes
SHA-256: ac0dba73724bb0362a94027abe51bea81bb6ea585a5b1c64f523a95b148dbb25
font_01_sfnt_off000071f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F8 10864 bytes
SHA-256: 6dbf21e64387e79c32e58e18747644279dcc1c6c78ffc558f9f6ad0fa59be715
font_02_sfnt_off00009716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9716 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660