Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ede637041994b1…

MALICIOUS

PDF

41.7 KB Created: 2020-11-07 01:48:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0d8bff53cebd4234dcc984ee5674e44e SHA-1: 1bf1dd2c912136410c57cfba87fa22699fa3242f SHA-256: 84ede637041994b11598d576b4ad40542ce9b3673281b35d9df5b6cf52b44539
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at `https://traffmen.ru/aws?keyword=racing+games+unblocked+games+66`. The document body, though heavily obfuscated, contains text related to 'racing games' and the URL, suggesting a lure to drive traffic to malicious infrastructure. 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://traffmen.ru/aws?keyword=racing+games+unblocked+games+66 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_5fa4661cd6cdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5f8a7b2e45c80.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/gokupukutev.pdfIn PDF document text
    • https://lavigepes.weebly.com/uploads/1/3/4/4/134437347/da313.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403263/normal_5fa4c853836b5.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/jusuberu/dudigebon.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/hawaii_five_o_season_4_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/6204957223.pdfIn PDF document text
    • https://s3.amazonaws.com/juzalizuvar/teen_patti_hack_version_download.pdfIn PDF document text
    • https://tugulix.files.wordpress.com/2020/11/dadofufapabakaxonawopodu.pdfIn PDF document text
    • https://vadazigifexe.files.wordpress.com/2020/11/merozasopegujibe.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/napulevefitopiwisesamo.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6340 5528 bytes
SHA-256: 645f6451f900468e5475ad78b7597984793b3e582f8ef137325006863abc666a
font_01_sfnt_off00007602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7602 10760 bytes
SHA-256: 97253deb2d3207c244543648aad4fd4de00c06f71498a73019b597b2023d36c8

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