Malicious PDF — malware analysis report

Static analysis result for SHA-256 23f9a24f91a93899…

MALICIOUS

PDF

43.9 KB Created: 2020-08-04 19:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40c9d23ae9efcccc5f52bf1724f2542d SHA-1: 424ef62d7ca77e8d88fe81a1102f15652268fb29 SHA-256: 23f9a24f91a93899943b9b6825263ad424927f85487dca7a05ac6357ed6e9fff
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.com'. This redirector is likely used to obscure the final destination and potentially deliver a malicious payload. The document body, though heavily corrupted, suggests a lure related to employment, aligning with common social engineering tactics.

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/pify?keyword=letter+for+employment+as+a+teacher+pdf
    • http://files.petervircks.com/uploads/1/3/1/4/131437249/rutewijusuwu.pdf
    • http://files.hemantic.com/uploads/1/3/1/8/131871979/nudives.pdf
    • http://files.shirleybrowskyfibredesigner.com/uploads/1/3/1/6/131606758/6952301.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/xuditegavubojimudodamagu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/pwc_blockchain_survey.pdf
    • https://cdn.shopify.com/s/files/1/0431/1305/4357/files/16973714704.pdf
    • https://cdn.shopify.com/s/files/1/0438/0462/3010/files/kajegidusumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3818/7413/files/vudoxibagazip.pdf
    • https://cdn.shopify.com/s/files/1/0437/3810/3962/files/lobajexubowikitosigiwave.pdf
    • https://cdn.shopify.com/s/files/1/0432/5254/7739/files/wilopepeve.pdf
    • https://cdn.shopify.com/s/files/1/0435/8668/3037/files/87408349919.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8626/files/gugixabibimade.pdf
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/61608905464.pdf
    • https://cdn.shopify.com/s/files/1/0437/5203/0357/files/pigafuta.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_off00006d5e.bin
5b89b5278ff56ddc020393941179f02b77fc9652e1d42df56a15ef048bcbda49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5E 5436 bytes
font_01_sfnt_off00007fb8.bin
6f18e90bcbc87e91708fa20e38f1ab88984fc0bc4ede3252978301f409c8a55c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB8 10276 bytes

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