Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf7b920267d079e…

MALICIOUS

PDF

60.6 KB Created: 2020-08-31 23:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93582416880a6b4836b3a14107a394f8 SHA-1: 97ac547d58f7f7f42224a97515bf4ebdbf83a4d2 SHA-256: 8bf7b920267d079edaf6a7a866179e81f1b31fae7482e03c74a54d5d6dcb2a2e
128 Risk Score

Malware Insights

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

The PDF was identified as malicious due to its inclusion of a link farm, with one critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK. This indicates the document attempts to redirect users to potentially harmful sites, exemplified by the URL https://ttraff.ru/pify?keyword=free+sheet+music+alto+voice+solo. The PDF also contains numerous links to other PDFs hosted on Shopify, suggesting a broad SEO-based lure strategy.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=free+sheet+music+alto+voice+solo
    • https://cdn.shopify.com/s/files/1/0463/2576/0155/files/aatma_movie_2013.pdf
    • https://cdn.shopify.com/s/files/1/0432/3311/6317/files/burger_king_gutscheine_schweiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/4089/1292/files/geography_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/2607/1199/files/asterix_y_obelix_descargar.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b7f122c35bf4c06913c209b901232f2.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/73158170679.pdf
    • https://cdn.shopify.com/s/files/1/0447/9824/7078/files/eyiz_listesi_detayl.pdf
    • https://static.usrfiles.com/ugd/b8c837_9af6a01153da4800bb69aa80a8cf6f5b.pdf
    • https://static.usrfiles.com/ugd/15d534_66ec7e2b837b497a9f73e2168b79aa3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e8723e5c2844bbfaa6b46d80c58e448.pdf
    • https://static.usrfiles.com/ugd/9ea91e_c13e75ee94fe42c3b456d9f2a70444b0.pdf
    • https://static.usrfiles.com/ugd/49be48_8c7d96e93bf04566b7d2a72deb833325.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_off0000adc8.bin
a1562f97a71e7f96b8e12eb038e0db5e46cbcd39e471026718691eea6dd40aae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADC8 5056 bytes
font_01_sfnt_off0000bed1.bin
b64ec64c7d45c1a3b4ca8a43b327805f2b3cc2c237ae13e335dcd721b43fb6ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBED1 11796 bytes

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