Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ee6e8f94650e56…

MALICIOUS

PDF

77.9 KB Created: 2020-12-16 22:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f9f931a0140efa26a61484b081642c7 SHA-1: e33c77437f41142b6dd0ff05566d6461747e3e25 SHA-256: f1ee6e8f94650e5676bd59baace6d395ab427a1d23fe6729633b013be8e981b2
154 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'. ML classification and ClamAV also flagged this file as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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/wb?keyword=derivatives%20of%20hyperbolic%20functions%20worksheet
    • https://static.s123-cdn-static.com/uploads/4467564/normal_5fcefbd3d73f0.pdf
    • https://static.s123-cdn-static.com/uploads/4465147/normal_5fcd4fb5cf672.pdf
    • https://zatazonikafude.weebly.com/uploads/1/3/4/3/134340422/valinonelimamadudi.pdf
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5fba97005efdc.pdf
    • https://cdn-cms.f-static.net/uploads/4413583/normal_5fb9fcfaddef4.pdf
    • https://cdn-cms.f-static.net/uploads/4401972/normal_5f9b2739f2f0d.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/69e6a7de-9d9f-44a1-8a83-05228f9176c1/jatumamekeviborasavizeda.pdf
    • https://s3.amazonaws.com/wotodedaruzuk/3897116237.pdf
    • https://uploads.strikinglycdn.com/files/9d3bf554-a99a-42b0-bd6b-73011265e3e2/consider_the_differential_equation_dy_dxy-1_x2.pdf
    • https://uploads.strikinglycdn.com/files/d82c5136-5fee-46cc-9f86-62d8d972ac86/kewojelabudixaxipaguwe.pdf
    • https://s3.amazonaws.com/lizuseguwix/38061347597.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ba.bin
cee2e4a576067c8cc4eb6cdebfaf54d2ed133891a0a89be74a1c4f44698fb96f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BA 3196 bytes
font_01_sfnt_off0000f370.bin
13cf248eb29fef3fc6876799d7b907af4799474c5440d3b4ce811f077d4ff07e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF370 5560 bytes
font_02_sfnt_off00010677.bin
747380bf3e83f8446ee136923aa175c943760856fc32ade5cf6790df44011772
pdf-font-stream PDF embedded font (sfnt) at offset 0x10677 11352 bytes