Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f644c040440ab47…

MALICIOUS

PDF

45.2 KB Created: 2020-08-22 18:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fd167ea0eb4be18d3c90283fb08cc5a SHA-1: 2436235ea17957698cd6f6e674bcfb5b86eeef07 SHA-256: 7f644c040440ab476baa7940f497fc305fde3bab832c2cb2c7c5779d0ec1b4cb
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=2019+daily+calendar+template+excel`. Additionally, it exhibits a PDF link farm behavior, with numerous links pointing to PDF files hosted on various domains, many of which are unknown or potentially malicious. The document body text, though partially corrupted, contains the same lure text as the redirector URL, suggesting a social engineering attempt to trick users into downloading and opening 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=2019+daily+calendar+template+excel
    • http://files.nancywijnants.com/uploads/1/3/1/8/131857758/2361119.pdf
    • http://files.janiferwheeler.com/uploads/1/3/0/7/130775934/rijitiseb_vukijajaj.pdf
    • http://files.crookeddoorstudio.net/uploads/1/3/1/3/131379591/b5173181.pdf
    • http://vikibik.spiritualgiftsministries.org/uploads/1/3/0/9/130969959/7037625.pdf
    • http://fekis.royaleliterental.com/uploads/1/3/0/8/130874233/7215935.pdf
    • https://cdn.shopify.com/s/files/1/0428/3983/4780/files/49504921129.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0766/files/goniferunonako.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/xosetefujagizovan.pdf
    • https://cdn.shopify.com/s/files/1/0440/7335/3366/files/metal_gear_solid_5_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/ribofoxezavudutafelud.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/xineful.pdf
    • https://cdn.shopify.com/s/files/1/0433/7618/1404/files/bncc_ensino_fundamental_1.pdf
    • https://cdn.shopify.com/s/files/1/0437/1211/8952/files/masha_babko_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0437/5799/4138/files/80388289942.pdf
    • https://cdn.shopify.com/s/files/1/0430/9588/3925/files/73391803391.pdf
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/wukonapokaximizifi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7143/9001/files/wukizososafusew.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4741/files/napukozibaxotijuwozud.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_off0000718d.bin
4088fede7fb8e3ed919095dd7b77483b487b1738d9a238c24bc3a9e668e3408f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x718D 5600 bytes
font_01_sfnt_off00008480.bin
0ebc650d11d9c42e02207391cf4cf8b268974942be1bf12938432facc330b34c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8480 10364 bytes

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