Malicious PDF — malware analysis report

Static analysis result for SHA-256 2960d91dcfc58cfc…

MALICIOUS

PDF

40.0 KB Created: 2020-08-27 22:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95d7bb6ae6c9112e05de9aab8798f7c3 SHA-1: 731dedb789f8efa10a6d869a562e52667a3274a7 SHA-256: 2960d91dcfc58cfcc5f1bf28b6042cd8903cff1e33ae2e63b5df830145f6d1bc
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and text related to an 'acupuncture app', suggesting a lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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=peter+deadman+acupuncture+app
    • http://sewujara.fountainplusasia.com/uploads/1/3/1/8/131856369/nuzorubiledo-tafixipiniga.pdf
    • http://gidili.nicoleolsthoorn.com/uploads/1/3/0/8/130814297/wakekut-torujabo-mumekamamo-luradonum.pdf
    • http://tosopika.thepointypencil.com/uploads/1/3/1/6/131636612/2763369.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75901524911.pdf
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/55399837635.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2563/files/forest_animals_coloring_page.pdf
    • https://cdn.shopify.com/s/files/1/0464/6889/0782/files/bichagadu_audio_songs_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0431/8711/0037/files/vulodivufuzibaferoxadi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3993/8970/files/dezibebabadep.pdf
    • https://cdn.shopify.com/s/files/1/0433/7165/9414/files/34217622117.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0928/files/applications_of_photogrammetry_in_civil_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/kafusatuwapafafebedo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/nobilu.pdf
    • https://cdn.shopify.com/s/files/1/0463/4791/1329/files/kevin_rose_podcast.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_off00005e91.bin
f9cfee3c69b19f234e2e2364b775137c4acfd038b047afb96622707c600fd66f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E91 5012 bytes
font_01_sfnt_off00006f7d.bin
a9f7ca915574ec6d48ca6ae74f55506c97164c9407c6244069037f7eb169fd48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7D 10500 bytes

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