Malicious PDF — malware analysis report

Static analysis result for SHA-256 400f7fdfa03184b4…

MALICIOUS

PDF

34.3 KB Created: 2020-08-11 08:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69bafef4ce1d258f388abb095dff2b37 SHA-1: 3b2ba89b28adcc64d452f6a07a5a6e50dd38561a SHA-256: 400f7fdfa03184b4cb7035ddf4c3c15d86e548f7664a8c5384a2a5e49ec1b309
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=descriptive+accounting+pdf+free+download'. This URL is presented within the document body, disguised as a free download. The PDF also contains a mass external PDF link farm, with many links hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute content broadly. The primary malicious URL is the most critical IOC.

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=descriptive+accounting+pdf+free+download
    • http://files.bullerquarterhorses.com/uploads/1/3/1/3/131380440/2099874.pdf
    • http://xuvola.himelappraisal.com/uploads/1/3/0/8/130873927/limut.pdf
    • http://files.sportsmanstandardpoodles.com/uploads/1/3/0/9/130969426/jitede-kebepaxa-luwejoboruneziv-dupira.pdf
    • https://cdn.shopify.com/s/files/1/0429/0985/9999/files/96522471615.pdf
    • https://cdn.shopify.com/s/files/1/0438/0642/5249/files/razukigavusexefur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ridikesomuzumiburowafex.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/files/15895008435.pdf
    • https://cdn.shopify.com/s/files/1/0440/5841/1158/files/2074194698.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/58239342928.pdf
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/pesuzedotorotipokugaxazu.pdf
    • https://cdn.shopify.com/s/files/1/0436/8387/2921/files/vewisizawofigog.pdf
    • https://cdn.shopify.com/s/files/1/0433/8139/1514/files/lisumuloxodewafevav.pdf
    • https://cdn.shopify.com/s/files/1/0429/6025/7177/files/jibafogelumarotelo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5622/6716/files/780986430.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_off00004821.bin
6aa0206567d36a37ca26df94dcd0c22bdb837ba4a7fbd70e264e120c360363f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4821 5472 bytes
font_01_sfnt_off00005ae7.bin
f38afb4c66bf2bfc97d1774a8789780e04243c5be394b28c76b0d7434abf7382		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE7 9672 bytes

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