Malicious PDF — malware analysis report

Static analysis result for SHA-256 4116094bd1dce7f0…

MALICIOUS

PDF

38.7 KB Created: 2020-09-05 03:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48fd5b75def07c33ad0726688c0f1420 SHA-1: 2ad6efd81b40041eb107bbb08352841100cd0f3f SHA-256: 4116094bd1dce7f0ae7fd765bae4660bda6d78bfd3d8cfb0fbd0d8030425953f
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.club/wix?keyword=guidelines+translate+google'. The document body, though heavily obfuscated, also contains this URL and numerous other links to static.usrfiles.com, suggesting a link farm or redirection strategy. The primary intent appears to be directing the user to the malicious redirector.

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.club/wix?keyword=guidelines+translate+google
    • https://static.usrfiles.com/ugd/754d94_b581f5d775e446289663f30063f0b09a.pdf
    • https://static.usrfiles.com/ugd/8ab72e_b389cc821e93476eaa354aa67856424d.pdf
    • https://static.usrfiles.com/ugd/6f9b04_6468fd3b3d024b99b229f40729b6174c.pdf
    • https://static.usrfiles.com/ugd/a01749_cce1b29b79c14c489ca1f9d61a2a2361.pdf
    • https://static.usrfiles.com/ugd/f64db8_43cdff506f924289a95cbc16b1093780.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a52eb78221f4fe49f00f493dab48e00.pdf
    • https://static.usrfiles.com/ugd/45e30f_30644a90ef4f440484cca59a849fed6f.pdf
    • https://static.usrfiles.com/ugd/299074_52eab6f05d4247ae850cb8fc166fe4b8.pdf
    • https://cdn.shopify.com/s/files/1/0434/7432/1560/files/92556433758.pdf
    • https://cdn.shopify.com/s/files/1/0434/9201/6280/files/worcester_27i_system_boiler.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/castrol_edge_extended_performance_5w-_20_reviews.pdf
    • https://cdn.shopify.com/s/files/1/0440/1030/7749/files/ewing_calculus_of_variations_with_applications.pdf
    • https://cdn.shopify.com/s/files/1/0433/5783/1336/files/who_am_i_casting_crowns_lyrics.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_off00005aa5.bin
e6c720ab311559415634d11380924bdb997195d256739981d4cbb94946b4c6c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA5 5024 bytes
font_01_sfnt_off00006bc6.bin
5bc8f8c2a2f7c04410836b22d15f6a781b1dbf1cbc6e4b738ce491e3932a1dbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC6 10064 bytes

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