Malicious PDF — malware analysis report

Static analysis result for SHA-256 86545629dbb7a605…

MALICIOUS

PDF

44.9 KB Created: 2020-08-30 19:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fa360e8f9c397b8c49eab1b1bcabe56 SHA-1: 603e5c81d6ad891aa9199b60a2c1e0fa9bf894d9 SHA-256: 86545629dbb7a605f0444686be1e2891a5675bfe2f2daacc80541c0898e73d64
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique often used for SEO link farms to manipulate search engine rankings or distribute malicious content. One of the primary links, 'https://ttraff.ru/wix?keyword=bolero+crosetat+manual', is flagged as a known malicious redirector. While many other links point to benign content, the presence of the malicious redirector and the sheer volume of links suggest a malicious intent to lure users to 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=bolero+crosetat+manual
    • https://static.usrfiles.com/ugd/df4650_a20992a1447f43c7abcb4c310d5ad5ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_397533cbcab74c6bb9105056425d7068.pdf
    • https://static.usrfiles.com/ugd/fd7405_458991986da04e539030733f2217614d.pdf
    • https://static.usrfiles.com/ugd/b8c837_b773e220c0374784937e1a949d98038a.pdf
    • https://static.usrfiles.com/ugd/8cbfce_c3bee020d06f47eabae8f5fef5aa36a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_4aa50fe820d14e128736a2324d81e37f.pdf
    • https://static.usrfiles.com/ugd/1cc777_0fd0c042d792425a825a8eadf7b4796d.pdf
    • https://static.usrfiles.com/ugd/97634b_8ed607bd749c4b24b64c5684ff062217.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3fd4d1c0b914197871449c1b5374d26.pdf
    • https://static.usrfiles.com/ugd/b8c837_d345e268873f4e8cafee38c42d1886bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_19ee4eedaeb04954a20a3e07c9d8c732.pdf
    • https://static.usrfiles.com/ugd/10e3af_108ba20be522415991a7f1102981b12d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed2ec2532ab9414db6307d41b171cbf8.pdf
    • https://static.usrfiles.com/ugd/9904c2_f2998f5f6bf440e1b8bd3dd7e9c7f9b4.pdf
    • https://cdn.shopify.com/s/files/1/0429/9020/7139/files/vugozulavelovisi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7179/8436/files/febodefexaxigezamebozu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/cast_of_the_movie_shooter.pdf
    • https://cdn.shopify.com/s/files/1/0428/1414/4675/files/zexonulitu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0108/6111/files/34259957016.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_off000066c4.bin
38fb3b975ee2348dabe6ecd4aa552407b8611d45ba49927832fa4e4b207a5632
pdf-font-stream PDF embedded font (sfnt) at offset 0x66C4 4996 bytes
font_01_sfnt_off000077a0.bin
caf23758d30053affcb312b99c4e1ec7a536c4fd29e1ab531a35228e0c6bac22
pdf-font-stream PDF embedded font (sfnt) at offset 0x77A0 15088 bytes