Malicious PDF — malware analysis report

Static analysis result for SHA-256 c19adce7098528da…

MALICIOUS

PDF

61.1 KB Created: 2020-08-31 03:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56d1c92324075a2c10379c960977ed55 SHA-1: 225d00d9f9a5234e1ca8215780d82fb3688fd971 SHA-256: c19adce7098528da95d35dd01d4214eb69a5a4595cbe75b8f56a9c5e5e8c2f0d
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=dejar+de+fumar+pdf', suggesting a lure to download a PDF related to quitting smoking. The presence of numerous PDF links, many hosted on cdn.shopify.com, indicates a link farm strategy to distribute 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.link/wix?keyword=dejar+de+fumar+pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/chronic_myeloid_leukemia_guidelines_uk.pdf
    • https://cdn.shopify.com/s/files/1/0468/0407/4645/files/dajupexotijodusewefeso.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/dudofuwumuvalirik.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7174/files/asma_bronquial_en_nios_gina.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_15cf2cf2cb1a478d8d80e8fbe7b0b4f8.pdf
    • https://static.usrfiles.com/ugd/529dbf_7cd452d84cbc410db6ad20997e06b0c6.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_649c15ed828a461c98f785946dc25a17.pdf
    • https://static.usrfiles.com/ugd/d17951_4e04de30cd6641acb11166cc6e1cc864.pdf
    • https://static.usrfiles.com/ugd/79e5df_e0bf34fec02b4066b447382679c14273.pdf
    • https://cdn.shopify.com/s/files/1/0445/6900/2143/files/61326709404.pdf
    • https://cdn.shopify.com/s/files/1/0431/3917/0466/files/75236719386.pdf
    • https://cdn.shopify.com/s/files/1/0437/6900/4190/files/15691136673.pdf
    • https://cdn.shopify.com/s/files/1/0438/1428/9568/files/8461519467.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_off0000a398.bin
97a10adfad89cbf0fff8b04e446d5f8455b1a0da6dce8ecb9198f1b638d6487a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA398 4592 bytes
font_01_sfnt_off0000b332.bin
00092a6aacc31445dc5e67a48508f39ad9bfb34c693e5d17fce519c6619b351b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB332 11284 bytes
font_02_sfnt_off0000d7ca.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CA 4324 bytes

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