Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c897e984d904cbf…

MALICIOUS

PDF

41.0 KB Created: 2020-08-14 20:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 543d3853d4fe9e238b04319d112df453 SHA-1: bcaeaa7ef310ce083720acec62072ece74a0dd5f SHA-256: 1c897e984d904cbf10ca65e7ce86b21d374f1130a824cb3d684f39ed3d564996
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 identifying a link to a known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=android+studio+flutter+ios`. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution. The presence of a large number of external PDF links also indicates a link farm, further supporting a malicious intent to drive traffic. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact lure.

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=android+studio+flutter+ios
    • http://files.myqualityvalue.com/uploads/1/3/1/3/131378868/xokezopetakebulinow.pdf
    • https://cdn.shopify.com/s/files/1/0434/7494/4153/files/sotunakamoseg.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/50220041892.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/fagigiroja.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3733/files/romofakojaje.pdf
    • https://cdn.shopify.com/s/files/1/0438/2267/8173/files/nevepobiwakaripebomelu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/jefitebuwotenapafi.pdf
    • https://cdn.shopify.com/s/files/1/0440/4084/7510/files/treble_clef_ledger_lines_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9606/4671/files/kajojexigorusapa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1602/7303/files/38109331627.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xakikalimakimoxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tefabojukiva.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_off0000668b.bin
363bae5a45701dd255cd6bbfca12c77d3011c9864f38897edeb6000c4b0372b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x668B 4680 bytes
font_01_sfnt_off0000767e.bin
2eace72e0778a3510d40b628b24c705a35b84fe5daa66485b851f105b0ef1e2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x767E 9736 bytes

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