Malicious PDF — malware analysis report

Static analysis result for SHA-256 95bf73400bb6c7ac…

MALICIOUS

PDF

46.1 KB Created: 2020-08-06 17:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aefafa41721f99862f656acd9435e42d SHA-1: 82314c70dd445fd7ee33e65432a2cae8dba1e543 SHA-256: 95bf73400bb6c7acb1ab90788cc695d5bf91bafae754df7f86cfd6c100b50463
150 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, disguised as a PDF to Word conversion tool. This is supported by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing. The document body also contains the same malicious URL and numerous other links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or distributing malicious content. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=convertir+archivo+pdf+a+word+en+linea
    • http://files.mhorakphotography.com/uploads/1/3/1/0/131070115/427588cd64.pdf
    • http://files.adultgleeclub.com.au/uploads/1/3/0/8/130814126/tebezufapegatoxum.pdf
    • http://files.brownsnotebook.com/uploads/1/3/0/7/130739351/674023.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7959/files/votedotuvevokap.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/22674889207.pdf
    • https://cdn.shopify.com/s/files/1/0438/2071/2098/files/the_barcode_tattoo_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/94196779639.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6439/files/94779852457.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/topewojefi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9557/3158/files/522035941.pdf
    • https://cdn.shopify.com/s/files/1/0435/5057/2695/files/71670584610.pdf
    • https://cdn.shopify.com/s/files/1/0437/7821/1991/files/96021117341.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/vejidikexenoka.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
font_00_sfnt_off00005342.bin
980fc75e4f61a0880f680b2af799e00d6b248a6239c5db907285243b0e192b01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5342 3644 bytes
font_01_sfnt_off00006046.bin
55f62a0da7f8c0d360356527cd4c7cb13eb38be1b62aed51b093b600dbeeb285		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6046 5028 bytes
font_02_sfnt_off0000716d.bin
8d69db9f3c3b8e91c93327b62ddbf6f37dd07baa12395447d1b3b4acab522732		 pdf-font-stream PDF embedded font (sfnt) at offset 0x716D 13684 bytes
font_03_sfnt_off00009cf9.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF9 4324 bytes

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