Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed7ac50a8a098dc…

MALICIOUS

PDF

48.9 KB Created: 2020-08-10 02:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 683f0408f30da997c3202b06c57a7abd SHA-1: 5c36d3a76fb64d7499ac962d38b2a30a4af67766 SHA-256: 3ed7ac50a8a098dc1844639ef4928e8792ffe34e8535073cf1b741ac4e782256
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=aditya+hridaya+stotra+book+pdf+telugu'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the first identified as 'https://cdn.shopify.com/s/files/1/0438/6563/7019/files/hosting_website_on_github.pdf'. The document body, though heavily obfuscated, contains fragments that suggest a lure related to a 'book pdf telugu'. The primary intent appears to be directing users to malicious infrastructure.

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=aditya+hridaya+stotra+book+pdf+telugu
    • http://files.meathcookeryschool.com/uploads/1/3/0/8/130814931/8358fbf.pdf
    • http://files.declutteredlifetx.com/uploads/1/3/1/4/131437949/15f951d18990.pdf
    • http://files.duckmoors.com/uploads/1/3/0/7/130776511/c97e1.pdf
    • http://rexeji.purduebap.org/uploads/1/3/2/8/132816066/93da0485.pdf
    • https://cdn.shopify.com/s/files/1/0438/6563/7019/files/hosting_website_on_github.pdf
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/electron_configuration_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/4161/9100/files/39736448483.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3610/files/59010883029.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jaled.pdf
    • https://cdn.shopify.com/s/files/1/0431/6584/3620/files/2517514764.pdf
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/gijalogemukefatal.pdf
    • https://cdn.shopify.com/s/files/1/0435/0659/8040/files/srimad_bhagavatam_in_tamil_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tazoxusejeko.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_off00007ec8.bin
ba6abfc745dc09350c7136dfa036c99e6b2cb5f2963262db8997943d00541014		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC8 5600 bytes
font_01_sfnt_off000091d9.bin
51a659f39be4c87cb6e511a5f67fec8eeb4a2ae8ed67d2224a633482effdab24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91D9 10764 bytes

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