Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab95f65cec0bd3d…

MALICIOUS

PDF

44.0 KB Created: 2020-11-01 07:51:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd96175593ecdad734a9ddb2e35dbcbd SHA-1: 7b1376cadeff8408bb9af92412a193dbba10dee3 SHA-256: 6ab95f65cec0bd3d2e6bd40c3a6b298073fc1aa69666f8a430997f73ed00753b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of many external links suggests an attempt to direct users to potentially harmful content or phishing sites, possibly as part of an SEO manipulation scheme.

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.ru/123?keyword=the+man+from+earth+script
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5f883525e8bf4.pdf
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/3909426.pdf
    • https://cdn-cms.f-static.net/uploads/4379841/normal_5f8eec381c7cb.pdf
    • https://riramiseba.weebly.com/uploads/1/3/4/3/134369938/625e4b83c5e.pdf
    • https://cdn-cms.f-static.net/uploads/4444622/normal_5f9c9f6bef3b3.pdf
    • https://cdn-cms.f-static.net/uploads/4369773/normal_5f93cf6ee7683.pdf
    • https://gasipepimajut.weebly.com/uploads/1/3/4/3/134367512/kebik.pdf
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/xinir_rowimofalapigi_senusam_wisisutakazo.pdf
    • https://mepetimis.weebly.com/uploads/1/3/1/4/131483418/luroka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0505/6659/4725/files/world_war_ii_activity_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/7df55053-f41c-49f0-b823-5f9b1989a0b6/nurifimilagomuzujelokaju.pdf
    • https://uploads.strikinglycdn.com/files/07850918-83c0-4215-84e9-9a9a0f8699aa/suwesefaxadigakonedit.pdf
    • https://cdn.shopify.com/s/files/1/0479/1586/0134/files/vuluzupofafife.pdf
    • https://uploads.strikinglycdn.com/files/58755c49-a185-4b0b-b7de-a41da5d89407/budejozel.pdf
    • https://uploads.strikinglycdn.com/files/52629aeb-fcd8-4782-8e83-7dcfd4438726/dying_light_split_screen.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_off00006d9d.bin
05417f43bf501110bff8a89f33c7e1774a3f140910f0cdff5e3f1be33e8b64e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9D 5172 bytes
font_01_sfnt_off00007f09.bin
573f9a6231d1fe633b59fcd18f47102dd1b95c1b8cb89f58dc5ed0226aef294e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F09 10608 bytes