Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa226a31bd826e80…

MALICIOUS

PDF

48.9 KB Created: 2020-11-05 19:44:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d7fda1656220e3cf5f719211aa3cc1f3 SHA-1: da3eeeca1e858093edd849c9655072c09e1cd635 SHA-256: aa226a31bd826e8028316b02d7761ef4ac88906838d5a05209bae7f3d3d6f218
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for downloading a game mod. The presence of multiple external links suggests an attempt to drive traffic to potentially malicious sites, aligning with a phishing or scamming attack pattern.

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://traffine.ru/strik?keyword=download+township+mod+apk+free+cash In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f9165c55ff66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f9132bb2fa72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444351/normal_5fa310e875fae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382192/normal_5f92971682b68.pdfIn PDF document text
    • https://mupaxezofede.weebly.com/uploads/1/3/4/3/134317166/zeveje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375884/normal_5f8de5fd6439c.pdfIn PDF document text
    • https://latijazaw.weebly.com/uploads/1/3/4/3/134312978/729f65.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/0f8203f8-8166-4aba-a3a2-b2e16ed3fa7a/12293988380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ef70bc3-156a-4a4b-b64e-e8473e4e065b/mujanonejov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10cc77ef-8e9c-40ce-afe0-ffa021a307f5/53199244413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3064/5416/files/android_studio_change_app_icon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c64b7a56-aa6d-42b7-889f-29190e63f364/68424716380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3077/files/voyager_middle_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7016f331-3a79-4c54-9021-8d546086e31f/manual_de_processo_penal_e_execuo_penal_nucci_download_gratis.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_off000069f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F2 5552 bytes
SHA-256: 3624aad39da7c9f7522a44eaf8242a0f740ef42d77a2474947dc8a237e0b19a8
font_01_sfnt_off00007cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC4 10748 bytes
SHA-256: 11d2a08d058ac2f0dcee024159a09500a52c68e8dd80e8b5394c62b0668674eb
font_02_sfnt_off0000a192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA192 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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