Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55075f465be8158…

MALICIOUS

PDF

46.8 KB Created: 2020-11-01 13:34:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eaaa8e596fea0238b33f1fa82a4abe4b SHA-1: b376d928919e1af65eabb3d9bf3af3527b6a0db3 SHA-256: e55075f465be8158ddf0e3b138f8d4b557982ed9dc681871398c943af2401a40
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.me/123?keyword=meet+the+robinsons+movie+worksheet', is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain this URL and references a 'movie worksheet' to entice clicks. The presence of numerous external PDF links, including a 'link farm', suggests an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.me/123?keyword=meet+the+robinsons+movie+worksheet
    • https://cdn-cms.f-static.net/uploads/4368997/normal_5f880187d68c7.pdf
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f888d80b5108.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e2fb2139-bdf1-49ad-a744-906393549d3f/jabotatugulixofedini.pdf
    • https://s3.amazonaws.com/tadovu/graphic_design_company_profile_sample.pdf
    • https://uploads.strikinglycdn.com/files/e993d6d4-ef2b-4b6b-b8d9-43227189a0dc/30363981357.pdf
    • https://cdn.shopify.com/s/files/1/0483/8640/8597/files/red_wing_lineman_boots_4417.pdf
    • https://uploads.strikinglycdn.com/files/bfd43190-3474-4b10-bfda-3b3dd4e1915b/12885576772.pdf
    • https://uploads.strikinglycdn.com/files/d505c773-b8a3-488d-8ee2-1af871b8b142/89910483004.pdf
    • https://uploads.strikinglycdn.com/files/8c6f746c-6ae3-4812-a905-a97763c6ef96/mei_bill_acceptor_parts.pdf
    • https://cdn.shopify.com/s/files/1/0504/6419/4720/files/62459265535.pdf
    • https://uploads.strikinglycdn.com/files/ed6b6c8c-5116-4d0d-aa24-1db9e7682c68/52845864586.pdf
    • https://uploads.strikinglycdn.com/files/0d7a03cb-10d3-4d5d-acc4-27c632b76911/31499250194.pdf
    • https://uploads.strikinglycdn.com/files/2a259b90-f565-4dc9-a073-072992d04a22/nanaxiwenil.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007815.bin
64298cab6db8c5b9a26ae64e15cb8af3720f55f5206aaeb69a8eb79d830684ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x7815 5044 bytes
font_01_sfnt_off0000892f.bin
3243268c53b894f3207587d351bc1ab76b3c26ff09e259ca7a98955dd4dfdba4
pdf-font-stream PDF embedded font (sfnt) at offset 0x892F 11000 bytes