Malicious PDF — malware analysis report

Static analysis result for SHA-256 98c1ba6793cb9e03…

MALICIOUS

PDF

47.6 KB Created: 2020-08-15 07:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f83f94be8dc8f5eb221c1a233e9a84c SHA-1: 1c182906b93812ba1b86a420863a5fe70f75972e SHA-256: 98c1ba6793cb9e0320a9025375823a59617d9c674b5f889b2a0e6c5b402034b6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting seemingly benign PDF files. However, one critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure. The presence of a link farm and a malicious redirector suggests an attempt to manipulate search engine results or deliver a malicious payload through a deceptive 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.ru/pify?keyword=ardhanariswara+stotram+lyrics+in+kannada+pdf
    • http://files.brickhouseantiquestopeka.com/uploads/1/3/0/7/130775974/nanezilusak-rotenuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/foledux.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/94677122942.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/lolodebutakesafok.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/bibojiragibabenolor.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6918/files/r_number_of_rows.pdf
    • https://cdn.shopify.com/s/files/1/0438/5295/5810/files/abcde_primeiros_socorros.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/26026987254.pdf
    • https://cdn.shopify.com/s/files/1/0438/4836/8288/files/lavegofonapedasepe.pdf
    • https://cdn.shopify.com/s/files/1/0437/4996/5985/files/21409939415.pdf
    • https://cdn.shopify.com/s/files/1/0438/1507/6002/files/nisevulagulorom.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_off0000566e.bin
9645d9b7a835ef58f9005a1215b6f82f88ad3e5f1c7d8b317b002ab54382d5c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x566E 5640 bytes
font_01_sfnt_off00006983.bin
af4b68189d2f612eff2cd20a92827ab5fc71ff18b7331668b48eddc0e4d9ab17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6983 10728 bytes
font_02_sfnt_off0000859f.bin
032d0170a53d445f13c4fc8d5e2ab1aed18c6ed7e4dac14f557e49a46fe385e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x859F 13208 bytes

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