Malicious PDF — malware analysis report

Static analysis result for SHA-256 c874f0678305abba…

MALICIOUS

PDF

43.6 KB Created: 2020-09-01 21:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66625085e0dd0a9514965dd0a48c5834 SHA-1: f943085e5abaccb55c5deb77a2624561ffcba47b SHA-256: c874f0678305abbaecc3016e10da2a1ee2658d97af304fc0938a0e1fc1df91e6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary heuristic indicates that the document links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the main lure. The file's purpose is to redirect users to malicious content via these links.

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.com/wix?keyword=compare+two+columns+in+separate+excel+sheets
    • https://cdn.shopify.com/s/files/1/0431/3622/1351/files/45810035.pdf
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/hernia_inguinal.pdf
    • https://cdn.shopify.com/s/files/1/0433/6579/3942/files/deleuze_and_guattari_capitalism_and_schizophrenia.pdf
    • https://cdn.shopify.com/s/files/1/0431/2858/6402/files/xubirizasinazalufozu.pdf
    • https://cdn.shopify.com/s/files/1/0454/7251/4206/files/bomelijavisozezunagil.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ebb990a82c140de998cf1f85cacf811.pdf
    • https://static.usrfiles.com/ugd/b8c837_a070c81b71a24ae6b21dd10e15ed75aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd4f171c888e4876a82e3c5141e8aab8.pdf
    • https://static.usrfiles.com/ugd/361045_9b16062901e84139a5250884b8e0c629.pdf
    • https://static.usrfiles.com/ugd/b8c837_f052f8db24284e6bbe30f4a55a3068a3.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0933/files/factorio_science_packs.pdf
    • https://cdn.shopify.com/s/files/1/0450/8162/4739/files/kabbalah_magic_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/7967/9656/files/candidate_interview_form.pdf
    • https://cdn.shopify.com/s/files/1/0440/0565/4678/files/61326734858.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/xaseketamekixusupawuja.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_off000061d1.bin
7cdd13821332bc686be78868150f9d6398a0e41d4b8471f4291d383260f937df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D1 5236 bytes
font_01_sfnt_off0000737f.bin
25fd4670302879f2f7f4d8412d4534afa9c60a580dc5caa2afa5c5b55051829d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x737F 14800 bytes

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