Malicious PDF — malware analysis report

Static analysis result for SHA-256 33236e17b41396cb…

MALICIOUS

PDF

40.8 KB Created: 2020-08-23 03:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7061800075b5ef6928fa8348ebf4d365 SHA-1: cb0ca800040b60cdcb654d7d02a43545e0156cd9 SHA-256: 33236e17b41396cb11c5d436d3a78b286aae570e463297670529f8df3b54773c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in

The PDF contains numerous embedded links, with one critical heuristic identifying it as a malicious redirector. The primary malicious URL, 'https://ttraff.cc/pify?keyword=teaching+colors+esl+worksheets', is likely used to funnel users to further malicious content. The document body, though heavily obfuscated, contains this URL and other links pointing to Shopify domains, some of which are confirmed benign while others are unknown.

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=teaching+colors+esl+worksheets
    • http://files.zoevanmourik.com/uploads/1/3/1/4/131437873/9601496.pdf
    • https://cdn.shopify.com/s/files/1/0429/8869/9802/files/sickle_cell_alleles_simbio_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/velokiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/75275251130.pdf
    • https://cdn.shopify.com/s/files/1/0438/1478/1088/files/99427369057.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3768/files/beowulf_roy_liuzza.pdf
    • https://cdn.shopify.com/s/files/1/0435/0181/3915/files/wozirepenifafesuxutajew.pdf
    • https://cdn.shopify.com/s/files/1/0429/2516/2652/files/airman_battle_uniform_camo_breakpoint.pdf
    • https://cdn.shopify.com/s/files/1/0431/1210/4103/files/booty_workout_routine.pdf
    • https://cdn.shopify.com/s/files/1/0463/1409/4749/files/sagaxotoxolofoseni.pdf
    • https://cdn.shopify.com/s/files/1/0435/3399/2085/files/l_carnitina_literatura.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4498/files/jabra_storm_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2017/files/20646180102.pdf
    • https://cdn.shopify.com/s/files/1/0439/0993/9368/files/50457323179.pdf
    • https://cdn.shopify.com/s/files/1/0460/2531/0367/files/chella_kutty_song_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasamonuje.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_off0000623a.bin
2fe666a3eee9874bc4e82ef540d61606daba8733aae9e7d48077e36a6cb26aee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x623A 5164 bytes
font_01_sfnt_off000073d8.bin
974069e0cdf80f8bec97f7bdd366596a8f909e732eb080cef8b5804dcc3526cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D8 10060 bytes

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