Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e1adc4b2fc9d58…

MALICIOUS

PDF

57.7 KB Created: 2020-08-08 15:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88b12305d0293ff0456229ae934fee26 SHA-1: db4eaba39f9587721184f27d0f69588f62c0e705 SHA-256: b1e1adc4b2fc9d589dd3bc684e72a5cef247ff43446104bc3524c4e004338692
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.ru/pify?keyword=oxford+phonics+world+6+pdf'. This indicates the document's primary purpose is to redirect the user to a potentially harmful site. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase the visibility of the malicious redirector. No scripts were extracted, and the document body is heavily obfuscated, but the malicious link is clear.

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=oxford+phonics+world+6+pdf
    • http://ralus.lkkstudio.com/uploads/1/3/0/7/130776483/7310066.pdf
    • http://kosafir.plantnerdmelbourne.com/uploads/1/3/0/8/130874493/1f9b0a5ebc3d178.pdf
    • http://bufarano.alliancetransfer.com/uploads/1/3/1/3/131380429/pefekijoru.pdf
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/vision_de_america_alejo_carpentier.pdf
    • https://cdn.shopify.com/s/files/1/0437/8319/2738/files/34585053362.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/90427228464.pdf
    • https://cdn.shopify.com/s/files/1/0430/3467/3305/files/23627315574.pdf
    • https://cdn.shopify.com/s/files/1/0434/6046/0701/files/20962757423.pdf
    • https://cdn.shopify.com/s/files/1/0436/4769/7056/files/john_deere_z425_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/mopusexomadededamala.pdf
    • https://cdn.shopify.com/s/files/1/0437/5271/8494/files/antecedentes_de_diabetes_gestacional.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5788/files/siwejisibekuvevem.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/27744664339.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ca1.bin
ca91598c0c2b88d38ed80ffc01580d2b7ca9ad266f5f0cc1b5411233e013c103
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA1 5372 bytes
font_01_sfnt_off00007ef9.bin
a1f981a647150bd670447435d26ad7ec6b17ceecc16300f4700241a2465a59e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF9 16336 bytes
font_02_sfnt_off000098d8.bin
5159a2928eea395216b3015fb586505445824deaeb481d8c3f1ce3a8e9045dcd
pdf-font-stream PDF embedded font (sfnt) at offset 0x98D8 10204 bytes
font_03_sfnt_off0000bbf6.bin
9ce968684b619d72bf8d9e2c6ed94cc14e98eb9be949baaa74a707aa5265accb
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF6 16388 bytes
font_04_sfnt_off0000d1cb.bin
28b3a1d5c72c44cb6e2bf3d356bc43230f5fae8876ec685329ad7145483ac6c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CB 1764 bytes