Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad85030fbe0927a9…

MALICIOUS

PDF

60.7 KB Created: 2020-07-30 03:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 759e6dad6814ce2d5b4bf9e482d6ae5b SHA-1: af9890d36708b1dfa8d87e0cacb5e8691929f462 SHA-256: ad85030fbe0927a9cc38d12f5a6b26a694ea6c88907c9ad9b145a1b88d294bd5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a mass external link farm, with one link pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to programming tutorials. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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=basic+programming+language+tutorial+pdf
    • http://files.124line.com/uploads/1/3/1/6/131607110/9137920.pdf
    • http://files.franciscanfoundation.org/uploads/1/3/0/9/130969461/rujibagujurofagap.pdf
    • http://files.controlsace.com/uploads/1/3/1/3/131379042/e17b89c9.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5494/files/jixopixed.pdf
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/23620065168.pdf
    • https://cdn.shopify.com/s/files/1/0432/1011/3186/files/60341213927.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9602/files/dozitumomirumemir.pdf
    • https://cdn.shopify.com/s/files/1/0438/7173/1880/files/50321014730.pdf
    • https://cdn.shopify.com/s/files/1/0430/6278/8245/files/91365120500.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8673/files/pimebekojosow.pdf
    • https://cdn.shopify.com/s/files/1/0437/1854/1480/files/58205990689.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/28283566674.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/94086449135.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/limebuzugirexasi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/gokixo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2436/files/rajatupeto.pdf
    • https://cdn.shopify.com/s/files/1/0436/0696/6429/files/26977476378.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/pugamiw.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_off0000ae4a.bin
cc1ef63f9384898b5103a4631adce6147f63208416f45462584fcc59374bd8e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE4A 5404 bytes
font_01_sfnt_off0000c088.bin
c1be35ea8dd6ca34712ac24198090e3f9acd8013853e63505ebc267219fa12d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC088 10596 bytes

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