Malicious PDF — malware analysis report

Static analysis result for SHA-256 41d5950689abe9b5…

MALICIOUS

PDF

40.9 KB Created: 2020-08-29 16:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 934f343a1414c63e347580c6c972d8d4 SHA-1: 598ff174f8fb341daba585f663dba3aaf8052587 SHA-256: 41d5950689abe9b5bf2c55711793ebbb7bc55397124655c801382ec9881015af
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, ttraff.ru, disguised with a search query for an academic PDF. The document body, though heavily obfuscated, also contains this URL and numerous other benign-looking PDF links, suggesting a link farm or SEO poisoning tactic. The primary intent appears to be redirecting the user to malicious infrastructure via the ttraff.ru URL.

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=ap+chemistry+zumdahl+7th+edition+pdf
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/principle_of_spectrophotometer_beer_lambert_law.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3587/files/79776815789.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/45469718763.pdf
    • https://cdn.shopify.com/s/files/1/0433/3935/0181/files/towudovinozu.pdf
    • https://static.usrfiles.com/ugd/b8c837_8432177643f44956bbf81b136dba065b.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d954e3e7ce14c37865a9b12ffd64b95.pdf
    • https://static.usrfiles.com/ugd/accd1f_e204f43ed71b48e5b4ca19038c88429b.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/85366116799.pdf
    • https://cdn.shopify.com/s/files/1/0428/5644/8156/files/street_fighter_game_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0437/5206/3125/files/35655636957.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/media_query_breakpoints.pdf
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/nagevadinominekurolari.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3799/files/burket_s_oral_medicine_12th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/84710996271.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/uber_brand_guidelines.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_off0000619e.bin
f46bf1e46c60b2d1672336515097402f4368fa9cc6622ff02e0aae57866c5720		 pdf-font-stream PDF embedded font (sfnt) at offset 0x619E 5616 bytes
font_01_sfnt_off000074a5.bin
5228127925679e65e3c0a63a01bca554dccdfd90f7b0d75447031ae426b3fd76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A5 10016 bytes

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