Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdcfc053cc7c14b7…

MALICIOUS

PDF

44.0 KB Created: 2020-08-07 05:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8113ae24bfd0c7902cf6a1034ee0479c SHA-1: f5fd4df2aa7d04ae131dd65a9141aa4cd0a9f129 SHA-256: fdcfc053cc7c14b7f989ea7aab55e4f085360439f92804037ac6e2d206d9c4fe
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily corrupted, contains the same text as the URL's keyword parameter, suggesting a lure related to 'application of computer pharmacy'. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking and distribute 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=application+of+computer+pharmacy+pdf
    • http://files.argylltsi.org/uploads/1/3/1/4/131407435/211665.pdf
    • http://files.circleofwealthgroup.com/uploads/1/3/1/3/131383541/vagizivusenizi.pdf
    • http://files.riannegroen.com/uploads/1/3/1/4/131453592/bfe432eb7f9.pdf
    • http://kilebe.murraysfoolsdistilling.com/uploads/1/3/1/8/131871699/faraka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32773531818.pdf
    • https://cdn.shopify.com/s/files/1/0435/1878/7743/files/ark_survival_evolved_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0431/0699/2289/files/13546600592.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/basilea_i_y_ii.pdf
    • https://cdn.shopify.com/s/files/1/0435/1623/1840/files/bahishti_gohar_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6235/files/midenod.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/wegokaxisetoj.pdf
    • https://cdn.shopify.com/s/files/1/0438/3870/1728/files/public_time_server.pdf
    • https://cdn.shopify.com/s/files/1/0429/0173/3542/files/17645817996.pdf
    • https://cdn.shopify.com/s/files/1/0440/9180/1752/files/what_is_baseline_survey.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_off00006ea9.bin
e036344e9d03630aea24f9645311e1d6c3f8c6afd5bd72f5eba0e143fbceecad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA9 5308 bytes
font_01_sfnt_off0000809b.bin
d6c11d100dae489ea0ffe20a21c99a410b6168bfaea66fb36994b83d7513de3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x809B 10084 bytes

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