Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea9ffee823cc083…

MALICIOUS

PDF

32.4 KB Created: 2020-10-29 23:13:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bec07bbe5e50f08265819275f64ead1a SHA-1: 5f200b3e38a422ea9741d3c692e7bef99414e832 SHA-256: 0ea9ffee823cc083db577984300c812db2f62058d56f3385986811cccd844a4c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a link farm, suggesting the document's purpose is to drive traffic to external sites, potentially for SEO manipulation or to host further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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://ggtraff.ru/aws?keyword=hit+the+road+jack+lyrics+video
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ratot_muweliwamopoj.pdf
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f8aef64e4450.pdf
    • https://cdn-cms.f-static.net/uploads/4391624/normal_5f92a8c069d8d.pdf
    • https://cdn-cms.f-static.net/uploads/4368746/normal_5f90ee5f50534.pdf
    • https://cdn-cms.f-static.net/uploads/4370057/normal_5f89174c37cc4.pdf
    • https://cdn-cms.f-static.net/uploads/4388181/normal_5f9527c92a600.pdf
    • https://cdn-cms.f-static.net/uploads/4406166/normal_5f9544274384d.pdf
    • https://cdn-cms.f-static.net/uploads/4414360/normal_5f9534458c5d6.pdf
    • https://cdn-cms.f-static.net/uploads/4370785/normal_5f8f98ea9a94a.pdf
    • https://cdn-cms.f-static.net/uploads/4401972/normal_5f952012dbcdb.pdf
    • https://movidotibapokab.weebly.com/uploads/1/3/4/2/134265591/daditaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/newopetusam/46372043909.pdf
    • https://s3.amazonaws.com/fapaga/kasabi.pdf
    • https://s3.amazonaws.com/kabisebax/35884693413.pdf
    • https://uploads.strikinglycdn.com/files/af31018a-6b9b-4688-81a0-c593242f7f5a/flotsam_book.pdf
    • https://s3.amazonaws.com/sevoga/72754715242.pdf
    • https://uploads.strikinglycdn.com/files/1d96ec5b-6498-4560-ac62-b6be646ca7f9/28807079561.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_off00004590.bin
7871ee3de01e82376b16b7801b0e89cb36f33141639fea87253f55d0db01b78d
pdf-font-stream PDF embedded font (sfnt) at offset 0x4590 5288 bytes
font_01_sfnt_off00005793.bin
16bd541895e71e8001d2bc0aa0cabfe0a51cbcb401f2b219f7cbdbe0f6cbebf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5793 8636 bytes