Malicious PDF — malware analysis report

Static analysis result for SHA-256 5550fa2390a5e2ad…

MALICIOUS

PDF

63.2 KB Created: 2020-07-28 12:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 531d99d44f866d3ff8898dbdb9d23810 SHA-1: b07e8e59bb145fccb34ba66eb33c468f77025485 SHA-256: 5550fa2390a5e2ad5cfbcceaaad3e4082378b0733cc07ced8fb32ff7a6fee26e
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.com/pify?keyword=christmas+sambaralu+album+songs', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to Christmas songs and the wkhtmltopdf application, suggesting a lure to disguise the malicious link.

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=christmas+sambaralu+album+songs
    • http://files.communitylifecompetence.org/uploads/1/3/0/8/130874489/3366850.pdf
    • http://files.wolverinemarketporthuron.com/uploads/1/3/2/6/132683088/zikive.pdf
    • http://files.heartlandjungians.org/uploads/1/3/0/7/130776841/ziniruper.pdf
    • http://files.skyleblanc.com/uploads/1/3/2/6/132681207/0526eb51cdb523.pdf
    • https://cdn.shopify.com/s/files/1/0428/9999/6839/files/65157459534.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/6997/files/fumemutimogezajapoge.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rikakaxudote.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pezudatilekubad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mesibilefonupas.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/2621660584.pdf
    • https://cdn.shopify.com/s/files/1/0439/3949/6094/files/63612912530.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/12389932569.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/famulogux.pdf
    • https://cdn.shopify.com/s/files/1/0429/0124/2022/files/19954077078.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3904/files/44885511012.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17418425376.pdf
    • https://cdn.shopify.com/s/files/1/0429/3620/5479/files/92550547505.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94430640368.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_off0000b536.bin
7fe9f31e3ec45bb4a8daab7eff5bfd2db3815273fd238071b705588f858f8b50		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB536 5028 bytes
font_01_sfnt_off0000c61e.bin
781121c3a385599465571f79b655a6ef2897f250af4004059e27b9de314a0b5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC61E 13160 bytes

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