Malicious PDF — malware analysis report

Static analysis result for SHA-256 33af9383a1097493…

MALICIOUS

PDF

42.2 KB Created: 2020-10-31 18:42:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45c86714c1d83349b7aec026ed033e77 SHA-1: 1da50d0ec8a9312ce15f4edf74e6c3001b5ff173 SHA-256: 33af9383a1097493babca4938976ab27fefb3600375914b51faab74dd1ea4232
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to 'ttraff.ru', identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the one flagged as malicious. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic, further indicating malicious intent.

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.ru/123?keyword=delano+mayan+theater+showtimes
    • https://cdn-cms.f-static.net/uploads/4384480/normal_5f8d70e2a006f.pdf
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/katake-wafezej-pilofuwivuv-lugopurigovepe.pdf
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/3f8ef8ba19db5.pdf
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f98ab62346d0.pdf
    • https://rusokupos.weebly.com/uploads/1/3/4/4/134468665/7ae28d8da564b54.pdf
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5f90ee1e150ed.pdf
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f986f106abcc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jamokaroxoj/9825495807.pdf
    • https://s3.amazonaws.com/kavitokolezub/nezurisopedogunide.pdf
    • https://uploads.strikinglycdn.com/files/51a9befc-e4e0-4d43-bd32-67c67f87f21e/the_odyssey_part_1_test.pdf
    • https://s3.amazonaws.com/wotodedaruzuk/rafunozipezitenamadudo.pdf
    • https://uploads.strikinglycdn.com/files/9a121d4a-7c83-4661-8a34-344f84c93306/87596459613.pdf
    • https://s3.amazonaws.com/memul/stay_hungry_stay_foolish_steve_jobs_book.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_off000062b1.bin
fa06cb8294771a227e3cfad1d715eceb9e039f3779335e8888a440bd1dbbf8e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x62B1 5120 bytes
font_01_sfnt_off00007406.bin
87f24fa618d2ff4aa08244bc23e62bb7178c9d847565daaa5eb4191d4fa29fff
pdf-font-stream PDF embedded font (sfnt) at offset 0x7406 12176 bytes