Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f07c4e95a04b7d…

MALICIOUS

PDF

41.5 KB Created: 2020-10-08 00:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 34d21842aea6ae5ca31ed7a2aebbc04e SHA-1: 3dda984c1be84dca6885d8641629c5a300b37c47 SHA-256: 79f07c4e95a04b7d73adc19949bc8a796c46c28f4da3e4ae192b4bd5c329825b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary purpose is to direct users to malicious sites, likely for phishing or to download further payloads. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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://gettraff.ru/strik?keyword=ng+das+statistical+methods+volume+1+pdf In PDF document text
    • https://site-1037121.mozfiles.com/files/1037121/41170042691.pdfIn PDF document text
    • https://site-1043098.mozfiles.com/files/1043098/vomajizojiretezulikanimun.pdfIn PDF document text
    • https://site-1038511.mozfiles.com/files/1038511/bowuzugedarutodevud.pdfIn PDF document text
    • https://site-1043119.mozfiles.com/files/1043119/29678861578.pdfIn PDF document text
    • https://site-1036628.mozfiles.com/files/1036628/tigaxijitilunasujuto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff885c8-8f32-4513-ad92-2db428409727/sewesebabipunokidatexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e853896-48c8-4bde-b91a-8a7d1c9149df/60862216984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3f22d67-5871-4114-ace7-9ca3d0cc9871/gakopowusujafixiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/367bcd5c-6164-4984-8b3f-5b60b75f17ed/jalexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1118/6585/files/pta_membership_campaign_ideas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1540/0355/files/psa_didnt_deliver_my_birth_certificate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8846/5051/files/97547957555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d23395fb-ce05-44f6-98af-fa6142289a04/sebaliwuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa6d258-68a8-4d34-9e48-046d43484eca/13954037268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a722d56a-6917-4511-8010-8c6de2d42fe4/jenav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93e5a893-fa27-4c07-96d3-e3aa96a82c48/jofagegowejijidufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6abb2cb8-09ff-4047-abaa-8cbbb4566746/nineritijusumov.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E17 5556 bytes
SHA-256: 131975e9c79bbf126b6b49ef39a0de0c7012952fdef29010f4ce1bd73420a5b2
font_01_sfnt_off000060f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F6 10144 bytes
SHA-256: c163f9d10f3f888f31d3007b32241a26a4f1bdfb26cffc375e23198a8a87e3e9
font_02_sfnt_off00008364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8364 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

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