Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6d75a6457e9e37c…

MALICIOUS

PDF

34.5 KB Created: 2020-08-18 17:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffe7978259418c0af171f6bcde628a73 SHA-1: e8632f12d4656ff8981dbf8f634309b6e044b3a0 SHA-256: a6d75a6457e9e37cb11e71d6b99f8cac6fee8edf76ad6c97e21702a4ed610fc0
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 link farms or phishing campaigns. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure. The document body contains text that appears to be a lure, possibly related to song titles, alongside metadata indicating it was generated by wkhtmltopdf.

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=anjathey+songs++masstamilan
    • http://xujuva.artisandogharness.com/uploads/1/3/0/7/130739564/niwanaraditapes.pdf
    • http://files.cosmiccacaompls.com/uploads/1/3/0/7/130738722/buremika.pdf
    • http://rijof.mrslorenzscience.com/uploads/1/3/1/1/131164250/1341566.pdf
    • http://dofon.ames-center.com/uploads/1/3/0/8/130874284/2553704.pdf
    • https://cdn.shopify.com/s/files/1/0431/7767/2868/files/migibewobifisifamolagifi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/best_books_of_all_time.pdf
    • https://cdn.shopify.com/s/files/1/0437/9721/7440/files/tratamiento_de_la_sinusitis.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/64886116048.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/33880958035.pdf
    • https://cdn.shopify.com/s/files/1/0439/7708/0990/files/95104742736.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/82819852281.pdf
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/32750887673.pdf
    • https://cdn.shopify.com/s/files/1/0437/7041/3207/files/ranejomikev.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/tetem.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/71462015337.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/mefupedakur.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/rafidazidutonar.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/zogakirikilogumenabada.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_off00004ae1.bin
755c8a9f14f81e82032e763acd64b49ab26afe0206ad7143112af29de39005da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE1 5172 bytes
font_01_sfnt_off00005c66.bin
8f891eb96923dfd922ae31eccccd13a84de2fcca04181d3f1b4096ab51a9b58b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C66 9640 bytes

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