Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28514e9ead4cca0…

MALICIOUS

PDF

41.2 KB Created: 2020-08-03 07:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fe7104dd8b8e49009a18e4b14e5b853 SHA-1: f987fdd8304d8c53a610dc557a386600811f2bd5 SHA-256: d28514e9ead4cca08a50407467699a2c4b63201b5f332ad5b940ab2f5e94845a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=python+milliseconds+to+datetime'. Another critical heuristic identified a large number of external PDF links, suggesting a link farm or SEO poisoning tactic. The document body, though partially corrupted, contains keywords related to Python and datetime, likely used as a lure. The primary attack pattern involves redirecting the user to malicious infrastructure via these links.

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=python+milliseconds+to+datetime
    • http://files.marinersguide.info/uploads/1/3/0/7/130775959/178d2ae253d9.pdf
    • http://files.sandpipermag.com/uploads/1/3/1/4/131437976/juxofiriram_guroxugu_rafudisowiro_wegamim.pdf
    • http://files.reneguerinart.com/uploads/1/3/1/3/131380739/fb498.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/fafigesatemawepemez.pdf
    • https://cdn.shopify.com/s/files/1/0437/6533/4165/files/renipexofomukurizufeguk.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/9038702480.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/warigedadorusiropekezoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3742/5818/files/dajegig.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2320/files/27603904948.pdf
    • https://cdn.shopify.com/s/files/1/0435/3723/6119/files/dosanipilizetosasego.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9969/files/kefijelumipelemuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0831/8878/files/dukutewaseremoxugubirup.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061b8.bin
4c77719d13d91cc313a4f27798fae3742da5c7a753568489fa9f34c89f97ce7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B8 5188 bytes
font_01_sfnt_off0000733e.bin
6786f489576f447c972ec783cea19d9ebfb14e851c1374913019f7dcb253b5cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x733E 10676 bytes

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