Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a3f75ff247b605…

MALICIOUS

PDF

53.8 KB Created: 2020-10-28 22:47:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da9e6761f13573dff2215272f3ed5985 SHA-1: b414c1d5dddca6619130ff70b3f5a9a66f70df27 SHA-256: 68a3f75ff247b60541610236670810024d7e1ef684785bb6be5f1a446dc959b2
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.cc/123?keyword=missing+required+dependencies+%2527numpy%2527+%2527dateutil%2527. The document body, though partially obfuscated, also contains this URL and other links, suggesting a phishing or scam attempt to redirect users to malicious content. The ML classifier strongly supports the malicious verdict.

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.cc/123?keyword=missing+required+dependencies+%2527numpy%2527+%2527dateutil%2527
    • https://cdn-cms.f-static.net/uploads/4401515/normal_5f9788688acb0.pdf
    • https://wilunozuwi.weebly.com/uploads/1/3/4/4/134432110/pimibuleni_tatovuvomo_ninunosumasu.pdf
    • https://cdn-cms.f-static.net/uploads/4376601/normal_5f8a5f263f3e9.pdf
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/nanatiju-kewisakedukukeb-bejesore.pdf
    • https://xasotuda.weebly.com/uploads/1/3/4/2/134235861/gurefajan_julexoxajuruw.pdf
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/8189469.pdf
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f95056b42143.pdf
    • https://rusakubasarozu.weebly.com/uploads/1/3/4/2/134266120/vuzewobunijero-tivora-tibifu-zidilex.pdf
    • https://waridiregap.weebly.com/uploads/1/3/4/0/134095836/muvomaw_bekub_dopatazo_rigewesetiropi.pdf
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/9edd6df0.pdf
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/622d8784d191f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/susopuzupure/relationship_of_archaeology_with_anthropology.pdf
    • https://uploads.strikinglycdn.com/files/8152735a-e4e4-43e8-a86c-932baea63036/42296896600.pdf
    • https://uploads.strikinglycdn.com/files/000b55e1-7748-4767-895b-7558e90e234a/gogitimirekanuvirafap.pdf
    • https://s3.amazonaws.com/leguvefu/7498340077.pdf
    • https://s3.amazonaws.com/wixamupelinere/art_and_craft_of_problem_solving_download.pdf
    • https://s3.amazonaws.com/dixaleko/xiravopezowakewexeliwoz.pdf
    • https://s3.amazonaws.com/gelawiweza/zixulikovuguz.pdf
    • https://s3.amazonaws.com/rubidokezive/neural_networks_and_deep_learning_a_textbook_aggarwal.pdf
    • https://s3.amazonaws.com/vavabi/ecologia_ambiental.pdf
    • https://uploads.strikinglycdn.com/files/5e7691be-8fb6-41c4-9b1f-808bcb7a9894/3688786684.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a66.bin
084ae3c96dc58be26b0c06d4ed2fc06d5c957c172af403b59a98acde963bd59a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A66 5432 bytes
font_01_sfnt_off00008cc6.bin
0b3b8f90e869cd1cdb52aaa1f67ec13cbc9e529e40969181bf1da74659d05456
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC6 18404 bytes
font_02_sfnt_off0000bb1a.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB1A 4324 bytes