Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fff87e735751fb3…

MALICIOUS

PDF

57.4 KB Created: 2020-08-29 04:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49da19c04e8e97a31a8018fb5d18eebd SHA-1: 7d142f501f77593cb75544021749fd42a68bfe8e SHA-256: 7fff87e735751fb3f76b96f9e6a5782944a9a06bbe87fb5e29ec7c35f1f21e44
120 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'Padi open water diver manual answers 2015' and embeds multiple links. One critical heuristic indicates a malicious redirector link to 'https://ttraff.ru/wix?keyword=padi+open+water+diver+manual+answers+2015'. Another heuristic identifies a PDF link farm, with the first URL pointing to 'https://cdn.shopify.com/s/files/1/0431/1842/8326/files/kigajed.pdf'. The document body, though heavily corrupted, contains the same malicious URL and references the PADI manual lure, suggesting a phishing or redirection attack.

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=padi+open+water+diver+manual+answers+2015
    • https://cdn.shopify.com/s/files/1/0431/1842/8326/files/kigajed.pdf
    • https://cdn.shopify.com/s/files/1/0432/7997/4556/files/46349387128.pdf
    • https://cdn.shopify.com/s/files/1/0438/6023/0294/files/character_certificate_format_for_job_doc.pdf
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/zuxatexipetinirodisido.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9015/files/makalah_metabolisme_protein.pdf
    • https://static.usrfiles.com/ugd/b8c837_681f2cc7fc5c4ddc8bff164975e67588.pdf
    • https://static.usrfiles.com/ugd/b8c837_5dac4b4bd9f741ab8b2ab39a188db7e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a738bd1569b4c1b8ac1690591a78efb.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cbcd5cb10574ca2ac8613995d8126b2.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/41906010649.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/85303729953.pdf
    • https://cdn.shopify.com/s/files/1/0438/4194/5760/files/18391830737.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6295/files/60455219242.pdf
    • https://cdn.shopify.com/s/files/1/0434/6796/4580/files/89088432830.pdf
    • https://cdn.shopify.com/s/files/1/0430/0183/9775/files/tamubalokupul.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000860d.bin
162c0a010de815b7113e95042773df5ff206858396d732a2cab15c40ed542f26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x860D 1644 bytes
font_01_sfnt_off00008e31.bin
8cac0874ffd353aba8089b1c7bb93653582db5987e3ce1f915129dd5780aec91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E31 5708 bytes
font_02_sfnt_off0000a1a6.bin
2df30c64b97ccb2843abf29c5a8ff3ba720237445e9a583b0b2f07585fdb381c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1A6 8976 bytes
font_03_sfnt_off0000b36a.bin
2575e0706b929a4ebd8c72f36c78e8c91312c7322419a228d285bf52ada65f19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB36A 10740 bytes

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