Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa34d92ed49b7ee…

MALICIOUS

PDF

57.7 KB Created: 2020-08-03 19:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 583eb17c860f2bc1edbff848bcb419fa SHA-1: c05af5fd413e8d8467f7ae0e4b946240867222de SHA-256: afa34d92ed49b7eee567315d6cb53fa3a27bf73f4f426fd2a81b64df1ead0bc5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=%25E0%25B8%2582%25E0%25B9%2589%25E0%25B8%25AD%25E0%25B8%25AA%25E0%25B8%25AD%25E0%25B8%259A+aptitude+test+%25E0%25B8%25A3%25E0%25B8%25B9%25E0%25B8%259B%25E0%25B8%25A0%25E0%25B8%25B2%25E0%25B8%259E+pdf, which is flagged as malicious. The document body also contains this URL, suggesting it is intended to redirect the user to malicious content under the guise of an aptitude test. The presence of a link farm further supports the malicious intent.

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/pify?keyword=%25E0%25B8%2582%25E0%25B9%2589%25E0%25B8%25AD%25E0%25B8%25AA%25E0%25B8%25AD%25E0%25B8%259A+aptitude+test+%25E0%25B8%25A3%25E0%25B8%25B9%25E0%25B8%259B%25E0%25B8%25A0%25E0%25B8%25B2%25E0%25B8%259E+pdf
    • http://files.bentobasics.com/uploads/1/3/1/0/131070459/tudavowuvijo.pdf
    • http://files.mansfieldmochamber.com/uploads/1/3/0/7/130739625/xujarusaxurefiwapar.pdf
    • http://files.joyeheld.com/uploads/1/3/2/7/132741555/dametuxuzuzi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/6298191697.pdf
    • https://cdn.shopify.com/s/files/1/0435/7039/7339/files/53437675224.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/square_d_heater_charts.pdf
    • https://cdn.shopify.com/s/files/1/0433/4895/1194/files/64539665063.pdf
    • https://cdn.shopify.com/s/files/1/0437/5294/7863/files/33037339785.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/sefapamofuveboga.pdf
    • https://cdn.shopify.com/s/files/1/0434/6419/6256/files/77516940047.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3429/files/befitakilaru.pdf
    • https://cdn.shopify.com/s/files/1/0429/6884/2393/files/lokilu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/28126111240.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/kukelaregomiza.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000086e2.bin
3dc2baa448d2576b82900fc0f2cddd777664dab4d6b7724612bc6b95f3ef5f7b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x86E2 18112 bytes
font_00_sfnt_off0000623a.bin
344eed12a572f5c84f13df33fb4099aa219a19eab439095123168689a57ee6b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x623A 4812 bytes
font_01_sfnt_off000072a8.bin
1cdc90876a26c503e175010a57492fb6d33c00ec59c5a5244fb56c42fdb16f76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A8 7664 bytes
font_03_sfnt_off0000b6c8.bin
47f42ab5545eb645920f7599d71bd6143c6a168a117188a753a9eca0ea9a9b7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C8 9076 bytes

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