Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc275f7d5a7ac97…

MALICIOUS

PDF

60.6 KB Created: 2020-08-21 02:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51a4dba4f6162009fffa6a1eaaade31e SHA-1: e00bac999814403daa36b3169e37bc09389821d7 SHA-256: 7dc275f7d5a7ac971b96bacb6032e80c1242e61c1f2bdc91c4056b51cab8731c
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary malicious URL identified is `https://ttraff.ru/pify?keyword=cardiac+circulation+pdf`. The document body, though heavily obfuscated, contains references to the topic 'cardiac circulation pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of multiple unknown URLs further supports a campaign distributing 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=cardiac+circulation+pdf
    • http://mogejoda.chickwrestler.com/uploads/1/3/0/7/130739017/kogoz.pdf
    • http://fegoku.joshuamilton.net/uploads/1/3/0/8/130814761/7227f270b183.pdf
    • http://nemawe.jennifernomad.com/uploads/1/3/2/3/132303027/paxeponiwetaloxiluf.pdf
    • http://paxamib.freetherobotcoffee.com/uploads/1/3/2/6/132695213/71dea4.pdf
    • https://cdn.shopify.com/s/files/1/0432/3871/9648/files/bodybuilding_anatomy_nick_evans.pdf
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/20510202759.pdf
    • https://cdn.shopify.com/s/files/1/0432/4294/6724/files/85258688438.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/natalie_portman_lonely_island.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/6306251275.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/73171988502.pdf
    • https://cdn.shopify.com/s/files/1/0433/5380/0859/files/13441689442.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9957/files/creative_writing_portfolio_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/instructions_form_940.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_off0000b0ab.bin
530d1f47ffe5a4776c4ce72d2168c80dce076cf916ba85bf7cd67890e479482b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0AB 4876 bytes
font_01_sfnt_off0000c150.bin
de013460bd7c29968a306edce7d4e7a3f8cb4a17af232531ef2e82f755b9e8f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC150 10608 bytes

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