Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9f5d7755267ddb3…

MALICIOUS

PDF

43.0 KB Created: 2020-08-31 04:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f26dad7b4a7c5a7056b200776e31bc7 SHA-1: f249c740e9a3556f3d2e2df493ad2e6f40bf23c9 SHA-256: d9f5d7755267ddb390f7d588fb067921bdf32ffe8a0a1f3689957d191d35de0e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=kenmore+coldspot+106+light+bulb', which is flagged as malicious. The presence of a large number of external PDF links suggests an attempt at SEO poisoning or a link farm to distribute malicious content. No scripts were extracted from this sample.

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=kenmore+coldspot+106+light+bulb
    • https://static.usrfiles.com/ugd/b8c837_b92030c7ddb24f22bdaf166238472d78.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_b710d7833c9b49bf8d62900df4314050.pdf
    • https://static.usrfiles.com/ugd/b50c55_939a731bfb2147c6af89484bb425b958.pdf
    • https://static.usrfiles.com/ugd/0d089b_28d8dfe99642472480493215d8846ef9.pdf
    • https://static.usrfiles.com/ugd/b8c837_1aaf54222abf48b4ba16555518336cbf.pdf
    • https://cdn.shopify.com/s/files/1/0433/7994/9718/files/72307941870.pdf
    • https://cdn.shopify.com/s/files/1/0444/2734/6086/files/how_the_mighty_fall_book_summary.pdf
    • https://cdn.shopify.com/s/files/1/0433/6150/1336/files/zotixidegeje.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/20314500846.pdf
    • https://cdn.shopify.com/s/files/1/0437/7041/3207/files/edexcel_a_level_business_calculation_practice_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/29692723058.pdf
    • https://cdn.shopify.com/s/files/1/0430/8048/2970/files/biegelinie_tabelle.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a2e.bin
42355569573d9c2c8ec34213575469ab6c8c5b8f008eefa92704341b884ef4b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A2E 5616 bytes
font_01_sfnt_off00006d1c.bin
0a4878c6156eded6688bee5c2096592ee4bc2e05f5b3ee2bda2260b7d81d40ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1C 10592 bytes
font_02_sfnt_off0000916c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x916C 4324 bytes

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