Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0277caad16f507d…

MALICIOUS

PDF

40.0 KB Created: 2020-09-02 23:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe4c17e61356b1b89fb9d52d77249252 SHA-1: 5a9f7dfb0b479300256b20e57656f83076392121 SHA-256: b0277caad16f507dc93188ab9cc6444012a0c2a1386e9ef1aec20356ea3f43a2
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=cardiac+arrest+algorithm+acls+pdf'. This URL is presented in the document body, disguised as a search result for a medical topic, likely to trick users into clicking it. The file also contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm or SEO poisoning tactic. No scripts were extracted, and the document body is heavily obfuscated.

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/wix?keyword=cardiac+arrest+algorithm+acls+pdf
    • https://static.usrfiles.com/ugd/b8c837_581ea006585b4ab29b69a9eaba43713e.pdf
    • https://static.usrfiles.com/ugd/ca300b_033450aaeff743cd83fb9af2c343b0cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_283188c811c942d19e284eda39a8c6a0.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18983443830.pdf
    • https://cdn.shopify.com/s/files/1/0436/9743/8875/files/customs_declaration_form_us_to_canada.pdf
    • https://cdn.shopify.com/s/files/1/0431/8022/8759/files/46443785469.pdf
    • https://cdn.shopify.com/s/files/1/0432/0660/7012/files/dumidagixuvadata.pdf
    • https://cdn.shopify.com/s/files/1/0436/1070/1981/files/guxirego.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mapitawaluzosamorexub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.pdf
    • https://cdn.shopify.com/s/files/1/0438/4640/2208/files/name_ringtone_akash_song.pdf
    • https://cdn.shopify.com/s/files/1/0463/0498/5245/files/3228126589.pdf
    • https://cdn.shopify.com/s/files/1/0437/4623/0426/files/afcat_question_papers_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/buwan.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3615/files/20509836464.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_off00005d7f.bin
7451652ee1f7d675a3faf3a09f7673fd60a22128e894b527204d0ff172308046		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7F 5476 bytes
font_01_sfnt_off00006fee.bin
3a3b6ff07727ada7de84f4764432be6af10a17293b68ea41eb390ffa7f65b4df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEE 10424 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.