Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d935b98760b6f5…

MALICIOUS

PDF

69.4 KB Created: 2020-12-02 09:36:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a018295cff4d0afe2f99034568da4aa SHA-1: d54872cce42c4fca4a40414c1d3a233d60f10735 SHA-256: d7d935b98760b6f550f65432a8f39a2ccd5f0eb6a66b23d18a81e9b25cb38fef
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are likely part of a scheme to distribute malicious content or phish users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/strik?utm_term=jedi+fallen+order+tomb+of+eilram+chests
    • https://cdn-cms.f-static.net/uploads/4377114/normal_5f8fa5be928be.pdf
    • https://weniwekozeg.weebly.com/uploads/1/3/4/0/134012595/4852597.pdf
    • https://mepopuwiv.weebly.com/uploads/1/3/4/4/134499337/zumotuge.pdf
    • https://xubidanata.weebly.com/uploads/1/3/4/8/134895671/c0353.pdf
    • https://cdn-cms.f-static.net/uploads/4427313/normal_5fa0c37de3f27.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dutimajizowa/pro_smart_slicer_demo.pdf
    • https://uploads.strikinglycdn.com/files/f8f95d2b-5cb5-47c1-91f6-e7bf704fb2d4/84020312252.pdf
    • https://s3.amazonaws.com/kuboki/43369483694.pdf
    • https://static1.squarespace.com/static/5fc0ebd09955c744b53ba8af/t/5fc467933485235c86535afa/1606707100684/8516200858.pdf
    • https://s3.amazonaws.com/saxefi/beintehaa_episode_60.pdf
    • https://static1.squarespace.com/static/5fc1a7ea16f6d44b07c4161b/t/5fc5aeb83c6ccf69f3236a5e/1606790842126/gadam.pdf
    • https://s3.amazonaws.com/wiwamoxamo/sat_schedule_2020.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_off0000cb34.bin
2a8b31c2e10b2fc54bd81fe12847b9ce251e695c2e2c197c54a1c4ef130739f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB34 5392 bytes
font_01_sfnt_off0000dd54.bin
9622a5fadb4eb41f418b4f0fc62f2395b265021897b792c2f65fdaa6b7bf754e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD54 1696 bytes
font_02_sfnt_off0000e5ca.bin
b7080889226585c56dcf51dbd8c2cebe73ad7249b450eafd6bf2f3d9eef3ce4b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CA 10016 bytes