Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76bab4f6c9dd490…

MALICIOUS

PDF

46.5 KB Created: 2020-08-20 07:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4cfce78683f2f986b2119b5697101e8 SHA-1: 94fec26ff21006f2ad6b42db16a3e2aa9aaf5cb2 SHA-256: c76bab4f6c9dd490efa94059f0a708f426896bbd5ed7d9877a9699c5462075bb
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=how+to+guide+template+word, which is likely used to redirect users to a phishing or malware-hosting site. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/pify?keyword=how+to+guide+template+word
    • http://files.jennifercarrpainting.com/uploads/1/3/1/3/131398253/5162026.pdf
    • http://files.scoutmusichouse.org/uploads/1/3/1/4/131437005/8231836.pdf
    • https://cdn.shopify.com/s/files/1/0434/2985/5393/files/pepopupabetasobuto.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4407/files/12382356987.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/66136957202.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/java_beginners_tutorial_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/bratstvo_crnog_bodea_17.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5195/files/free_printable_targets_for_shooting_practice.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/84335882951.pdf
    • https://cdn.shopify.com/s/files/1/0434/1248/8348/files/aramaic_english_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0437/9177/7949/files/mimora.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1178/files/nibeximuxegetofo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29426312843.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c37.bin
2840d1e6f39155257998fc7c487d80a8360cceda36538ac9ae760953241022d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C37 4932 bytes
font_01_sfnt_off00007d11.bin
c3e0153a98fea738791df04e0d8bad3b84ae2402281d4f39c5a21d9bbfc565f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D11 9980 bytes
font_02_sfnt_off00009f2e.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F2E 4324 bytes

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