Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09c5c08912e1afb…

MALICIOUS

PDF

37.6 KB Created: 2020-08-06 11:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67e1dc942af1f71687ca9651071bfcbe SHA-1: 08eeab8ed0a1882d35bbaf94c87f94d42566ef4b SHA-256: d09c5c08912e1afb65024ec15c25d55948062a93de2f4fc3839d899cfbef9230
120 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to lure users into clicking on a link related to 'CEH v9 certified ethical hacker practice tests pdf'. This link redirects to malicious infrastructure at ttraff.cc. The document body itself is heavily obfuscated but contains the same lure text and the malicious redirector URL. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a link farm SEO tactic to distribute the malicious payload.

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=ceh+v9+certified+ethical+hacker+practice+tests+pdf
    • http://files.rupeshgoyal.com/uploads/1/3/0/9/130969525/gasuwifazigemufuz.pdf
    • http://files.takebacktheknight.com/uploads/1/3/1/4/131409508/906564.pdf
    • http://files.harvestpfc.com/uploads/1/3/0/7/130738870/cc54e7.pdf
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/rafux.pdf
    • https://cdn.shopify.com/s/files/1/0427/5663/6828/files/mudomalifamoteb.pdf
    • https://cdn.shopify.com/s/files/1/0437/6598/9530/files/mivinurisiteduva.pdf
    • https://cdn.shopify.com/s/files/1/0434/2113/9096/files/tatogaxase.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/7383057540.pdf
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/directory_commands_in_linux.pdf
    • https://cdn.shopify.com/s/files/1/0431/1567/5815/files/avicii_wake_me_up_chords.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6087/files/84246298292.pdf
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/98411497225.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8455/files/15625807480.pdf
    • https://cdn.shopify.com/s/files/1/0429/2168/9254/files/building_self_esteem_activities.pdf
    • https://cdn.shopify.com/s/files/1/0432/1542/1599/files/wekuxux.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_off00005496.bin
d9ffa281c97f608dfa5bfdb48109f440d65a378e5eb4c4154ef2ef279d21ee38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5496 5428 bytes
font_01_sfnt_off0000670a.bin
5f1c757ad20e3edff6d43a1db71b117aaedf14bf0439875bab02204e6e418a51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x670A 10128 bytes

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