Malicious PDF — malware analysis report

Static analysis result for SHA-256 39629c4017577d5e…

MALICIOUS

PDF

40.3 KB Created: 2020-08-15 04:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60726eedd252dbb09ce993365bed3deb SHA-1: 49c7f6a62c4751fbffcd2a5421b656c7948b336f SHA-256: 39629c4017577d5e15a523f9c409eeddec776ed5e1a554bd5dab3bb177a93511
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, also contains the URL pointing to the malicious redirector. The presence of a mass external PDF link farm suggests an attempt to manipulate search engine results or to distribute malicious content through a large number of seemingly benign links.

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/wb?keyword=conditional%20type%200%201%202%20exercises%20pdf%20with%20answers
    • http://files.andreavytlacilova.com/uploads/1/3/1/4/131438759/kevemikajezasil-manegizu-zefemafoxakeki-filubunexadi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/life_selector_credits_hack_download_2020d_2029.pdf
    • https://cdn.shopify.com/s/files/1/0437/4432/9877/files/malesi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0581/9550/files/65008873502.pdf
    • https://cdn.shopify.com/s/files/1/0435/1793/5770/files/faritibavasixale.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/grade_11_chemistry_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7010/3452/files/98499848937.pdf
    • https://cdn.shopify.com/s/files/1/0431/2478/5319/files/49057611997.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0655/files/10385129644.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005205.bin
70e70d414606c9f5d8b9731f02937ff6ea3e779ec4143d8c4cde40fbd471d946		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5205 5640 bytes
font_01_sfnt_off00006559.bin
3765a45ef20a4548e66569bcaaa3c33888d6f3e21296afd0cc7cf2de6bd6a70a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6559 9624 bytes
font_02_sfnt_off00008663.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8663 4324 bytes

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