Malicious PDF — malware analysis report

Static analysis result for SHA-256 c812b1b23494d1a2…

MALICIOUS

PDF

46.6 KB Created: 2020-10-23 05:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d148796d75529a8ab2f8328d89bc0aa8 SHA-1: 0ac79788b75050413e4245dec50513b2da9a9f24 SHA-256: c812b1b23494d1a2d57eca3b1a4fb2acb83f76a5620f593d0e83df7ebd46db80
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on Weebly and appear to be part of a link farm designed to attract traffic. One of the primary links redirects through a malicious domain, ttraff.club, which is flagged for redirecting to known malicious infrastructure. The document body, though heavily obfuscated, contains text related to a 'Pokemon sword and shield strategy guide leak', suggesting a lure to entice users to click the embedded links. The ML classifier also strongly indicated maliciousness.

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.club/pify?keyword=pokemon+sword+and+shield+strategy+guide+leak
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/1649241.pdf
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/0c1d659763.pdf
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/21684.pdf
    • https://duririsi.weebly.com/uploads/1/3/4/0/134096382/f72c942c9c8dfa5.pdf
    • https://razezoxuwen.weebly.com/uploads/1/3/1/4/131453099/popegefov-robet-tifafovivikeju-gunowetugur.pdf
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/degixatakino-kolagexus.pdf
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/6bf0e58d14.pdf
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1109957.pdf
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/4733702.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/391582.pdf
    • https://cdn-cms.f-static.net/uploads/4373749/normal_5f8a7a6f1a7ce.pdf
    • https://cdn-cms.f-static.net/uploads/4387810/normal_5f922f21abed3.pdf
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f91addf491fd.pdf
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f8ea3134c839.pdf
    • https://cdn-cms.f-static.net/uploads/4383917/normal_5f8f4d9e094da.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vazisi/access_bank_aptitude_test_questions_and_answers.pdf
    • https://s3.amazonaws.com/wilugugo/paxufuxomodarun.pdf
    • https://s3.amazonaws.com/bitajemisajoz/the_role_of_missionaries_in_the_colonisation_of_zimbabwe.pdf
    • https://s3.amazonaws.com/domegagowevag/50178691203.pdf
    • https://s3.amazonaws.com/davubewu/55613650281.pdf
    • https://uploads.strikinglycdn.com/files/b98b2d25-5811-4900-a800-e92309b24933/material_girl_torrent.pdf
    • https://uploads.strikinglycdn.com/files/bdb71791-9247-4b70-98e2-df26a1283300/jakabisitetiwef.pdf
    • https://uploads.strikinglycdn.com/files/06c787f5-e949-4b94-9e1b-dba923714ccc/you_were_never_really_here_screenplay.pdf
    • https://s3.amazonaws.com/lewuli/bsc_1st_year_zoology_syllabus.pdf
    • https://s3.amazonaws.com/subud/guia_calistenia_yerai_gratis.pdf
    • https://s3.amazonaws.com/migivewuwe/95012855440.pdf
    • https://s3.amazonaws.com/sinadi/61818746725.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_off000073c0.bin
ae022129048ea52e2ed5569bd24a6a07691bb21f0d402fe63c582cb95c9637c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C0 5496 bytes
font_01_sfnt_off00008651.bin
fa65b07958e1e42a57e9d3cb303a58d368baedf905b74562d30909bd68022824		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8651 10564 bytes

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