Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c583b904608c2d…

MALICIOUS

PDF

43.7 KB Created: 2020-08-31 07:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b4799394abb193196fe9b20a3199c9e SHA-1: fdb82bbbc3b71ce7b2dc2b312a0ad68b6692bda1 SHA-256: c0c583b904608c2d119b445cb9e40e17139da43e8eb4c5b3539f4052a80376d0
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic designed to lure users to malicious infrastructure. The document body, though heavily obfuscated, contains the malicious redirector URL and a benign-looking PDF filename, reinforcing the lure.

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.cc/wix?keyword=michael+carpenter+dresden
    • https://cdn.shopify.com/s/files/1/0443/5014/4668/files/salesforce_admin_training_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/6957/0198/files/86135528725.pdf
    • https://cdn.shopify.com/s/files/1/0432/6981/6478/files/pabosabirox.pdf
    • https://cdn.shopify.com/s/files/1/0431/9608/8481/files/jaxugofinarole.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8740/files/pyro_process_in_cement_plant.pdf
    • https://cdn.shopify.com/s/files/1/0435/6407/3128/files/fopepikiwitikaletulure.pdf
    • https://cdn.shopify.com/s/files/1/0430/2857/8467/files/color_by_number_free.pdf
    • https://static.usrfiles.com/ugd/b8c837_feea9c8c46c14084a1ed97d141a35646.pdf
    • https://static.usrfiles.com/ugd/804ff6_a49cd5faf3bd4468aa32b038b15bcdc8.pdf
    • https://static.usrfiles.com/ugd/b8c837_e71e2132e20b4d69be56b8fe8620941c.pdf
    • https://cdn.shopify.com/s/files/1/0438/7491/0376/files/mexowof.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/39670607107.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_off00006ed8.bin
c2b81417ef911908aedcb52d5b89463cd8513f9b61c756dd18f64118bd5b4c6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED8 5168 bytes
font_01_sfnt_off00008054.bin
8455f2850b992326d5bd6860357496db8b53567fb806504159fd959fd1a925a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8054 10104 bytes

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