Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4bbcc14dca9fe3d…

MALICIOUS

PDF

42.2 KB Created: 2020-08-13 22:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e0e9a24c0166e0b1e621137f9bcddfe SHA-1: 65bff61946f12e9502290ed89bf96e217169b845 SHA-256: f4bbcc14dca9fe3d6c7d90fd923e5a92ca9cf173a0d83519007b905a9ae21c09
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=ravi+prakash+name+ringtone', is flagged as malicious, indicating a redirection attempt. The document body, though heavily obfuscated, contains this URL and references to 'wkhtmltopdf', suggesting it was generated programmatically to host these links. The presence of a malicious redirector and a large number of external links points towards a campaign focused on driving traffic to potentially harmful sites.

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.ru/pify?keyword=ravi+prakash+name+ringtone
    • http://minejol.accesswellnessga.com/uploads/1/3/0/8/130814328/994903d.pdf
    • http://dukefoj.wvmountainyoga.com/uploads/1/3/2/6/132681513/8835324.pdf
    • http://daraba.natashahanova.com/uploads/1/3/1/3/131379698/tedopupagagi_zenisaxus_tugemiw.pdf
    • http://files.foryourmilitarymarriage.com/uploads/1/3/2/6/132681836/2f4ef6d.pdf
    • http://files.lavernesartpotfolio.com/uploads/1/3/2/6/132695531/985f572576c6d.pdf
    • https://cdn.shopify.com/s/files/1/0430/8543/0945/files/83408049000.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9430/files/78909638025.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/pixujibupu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/ts_file_to_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0433/4914/7803/files/ziporinutemu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/9683969542.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9208/files/pagpili_ng_batis_ng_impormasyon.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/english_syntax_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/megepuwewovalidovijag.pdf
    • https://cdn.shopify.com/s/files/1/0429/1677/4054/files/77677208666.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/
    • https://cdn.shopify.com/s/files/1/042

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ecf.bin
a2ade18c3e38f728b079e4af8f6c2904d94ec9624314b271d4472c19c1aeafc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECF 5332 bytes
font_01_sfnt_off000070ce.bin
e5256c8a20500caba7c235821baf876093cbc2f2d769c3e294235ff2273fb3c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70CE 13800 bytes

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