Malicious PDF — malware analysis report

Static analysis result for SHA-256 cff8a0d4f3d18a62…

MALICIOUS

PDF

46.3 KB Created: 2020-08-18 23:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d0df615be6db1fcbf2e64bae6662c76 SHA-1: eaadc8a356e6ecaff564cfdb7ebc108894ac527e SHA-256: cff8a0d4f3d18a628b44d85e27898bc50fb69660cfaf31dbd02830f185ecd616
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, which is indicative of a link farm designed to manipulate search engine results or obscure malicious destinations. One critical heuristic firing confirms a link to a known malicious redirector, 'ttraff.cc', which is used to deliver the final payload. The document body, though heavily obfuscated, contains text related to 'Calendar 2018 pdf canada', suggesting a lure for users searching for such content.

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.cc/pify?keyword=calendar+2018+pdf+canada
    • http://files.idlesappho.com/uploads/1/3/1/8/131856039/zaxeje-povorifepakuzi-tubededubez-jaruleti.pdf
    • http://files.crowncustomsandcoatings.com/uploads/1/3/2/7/132740628/jejuboliminazuredilo.pdf
    • http://files.boundtogethercounseling.com/uploads/1/3/1/4/131453365/mosawufakedanux_zasimiwo_banemojizu_zowipan.pdf
    • http://dowar.shoppingforagift.com/uploads/1/3/0/7/130739173/7847082.pdf
    • http://files.artisticlicensequartet.com/uploads/1/3/0/7/130740625/desanusez-wutoka.pdf
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/43008812783.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/captivating_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/7886/7351/files/79313777647.pdf
    • https://cdn.shopify.com/s/files/1/0440/0729/3086/files/69943094373.pdf
    • https://cdn.shopify.com/s/files/1/0436/7027/4201/files/48034228907.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/17711187929.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8041/files/character_traits_graphic_organizer.pdf
    • https://cdn.shopify.com/s/files/1/0438/6809/4629/files/reset_master_branch_to_upstream.pdf
    • https://cdn.shopify.com/s/files/1/0429/1896/9507/files/piwiwadupovine.pdf
    • https://cdn.shopify.com/s/files/1/0437/7745/8334/files/traductor_portugues_brasileo_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0435/9582/5320/files/54771635147.pdf
    • https://cdn.shopify.com/s/files/1/0429/7388/8671/files/vogoxogukofemebuforo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/lonixivupelukugom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006088.bin
8de0f9d6253f2c2693503c779e05038e062e5689aa571e5a37f49b9b4610d181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6088 5396 bytes
font_01_sfnt_off000072f2.bin
679c7fcfea43a01515d9a076f091180dd5283fda7faea3783d44fa41018c82c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F2 10604 bytes
font_02_sfnt_off00009705.bin
aed46c9af23f208f135cb03afacfd1ac790ba89857c5134c11dc43e7260cc7d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9705 16108 bytes

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