Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e017baa302fde02…

MALICIOUS

PDF

91.5 KB Created: 2020-12-18 16:26:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bede0953afd5b7460c57f59eb1e4e97 SHA-1: dc50753a8d60f00246cb366162de496ee9844c6e SHA-256: 7e017baa302fde021cc81c810aa3534dd551723003d5cac7320d82d667bc9571
214 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically `https://cctraff.ru/strik`. The heuristic `PDF_SEO_LINK_FARM` indicates a large number of external PDF links, suggesting a tactic to distribute malicious content or phish for information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

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://cctraff.ru/strik?utm_term=saeco+exprelia+evo+service+manual
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5f88828f86398.pdf
    • https://dawupewutusod.weebly.com/uploads/1/3/4/8/134879821/1327462.pdf
    • https://static.s123-cdn-static.com/uploads/4485579/normal_5fc84fe1eb4b2.pdf
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/abd35.pdf
    • https://cdn-cms.f-static.net/uploads/4415962/normal_5f9e283b1664f.pdf
    • https://cdn-cms.f-static.net/uploads/4495034/normal_5fd811f321af8.pdf
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f871014df02d.pdf
    • https://cdn-cms.f-static.net/uploads/4460460/normal_5fbdbc132bde2.pdf
    • https://static.s123-cdn-static.com/uploads/4459780/normal_5fcd1b81207d8.pdf
    • https://cdn-cms.f-static.net/uploads/4419205/normal_5f9e3ddea92f7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/bulikowexunepov/latugasokabovoxazugeluke.pdf
    • https://s3.amazonaws.com/remoxi/53689790040.pdf
    • https://uploads.strikinglycdn.com/files/55df7346-f576-4b37-8582-dcc5e75d5051/faladetotidokevomajamug.pdf
    • https://s3.amazonaws.com/dufekifaral/arabic_keyboard_free_windows_10.pdf
    • https://s3.amazonaws.com/sinamozagemoger/about_time_theme_sheet_music.pdf
    • https://uploads.strikinglycdn.com/files/a008d1c6-e8ca-4a5a-8464-42ad06d24d79/maladie_de_forestier_handicap.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_off0001181f.bin
05365319325146fba87c91619bd0c7efb9209a66eba4446a344d0f7328d5f40d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1181F 5112 bytes
font_01_sfnt_off00012959.bin
f9e477e488c94b9d9c180c284a1ddfed166b3b9ef3d618eed7cd6429e2d2a9ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12959 12980 bytes
font_02_sfnt_off00015290.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15290 4324 bytes

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