Malicious PDF — malware analysis report

Static analysis result for SHA-256 286d7d90138ee966…

MALICIOUS

PDF

42.8 KB Created: 2020-08-28 23:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f57c7d575f4f09112d066ed4939b906 SHA-1: ad4d1515dca122525227e73141f8a98db1d4485b SHA-256: 286d7d90138ee9663ef31c67781328a4c7aa5edbb1c3e9df0f03c5d79cef66aa
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to search terms. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to drive traffic to potentially harmful sites.

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=the+picture+of+dorian+gray+study+gui
    • https://static.usrfiles.com/ugd/b8c837_97715f0395ef4dd58396046bfa7ab6f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_3cae11349c0f48c1aa905d019fc1a3b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_7547b62a960b4f7ba97de62b12829a1d.pdf
    • https://cdn.shopify.com/s/files/1/0431/6787/5221/files/bnp_paribas_mutual_fund_redemption_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/jar_of_hearts_chords_piano_sheet.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc102151c145408da4fd1d363b2187d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_012c1a48c59c4d30b027a1d7a6c9ffdf.pdf
    • https://static.usrfiles.com/ugd/b8c837_997ae683a9c349bf93a1d04be82e9c43.pdf
    • https://static.usrfiles.com/ugd/b8c837_1419d63d92f34f3ca6cab4cd2a702b00.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c18c599f1804bd293cf5e7b71338cb3.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f3c9b208a314ac3b35194506fae5083.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e4e60300a364766892853ec9bd7eabb.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_off000068c8.bin
3b2eef24382c44d292a5744caf8b6819a3b8695c657cdc4ae689939ab09c6fcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C8 5436 bytes
font_01_sfnt_off00007b45.bin
cfcb0fd20d2b668b8755bb5db75a89237054774ed90038727b29c4a8592cac90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B45 10388 bytes

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