Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d37ee22c367a22…

MALICIOUS

PDF

41.9 KB Created: 2020-08-01 20:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3246702ed0308ef6b32c09ed1223fb5 SHA-1: 51f47b8532202685fd6615e1eadfa933f7a7cdd8 SHA-256: a7d37ee22c367a22ea2ed189c927a94e2bf522dc8c53973ac75e1b050a69ac09
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=hit+that+lyrics'. Additionally, it exhibits a PDF link farm heuristic, with numerous external links, many hosted on shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body contains the same malicious URL, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=hit+that+lyrics
    • http://files.kilkennyarchclub.com/uploads/1/3/1/3/131383791/kogawav.pdf
    • http://files.bluelabelmen.com/uploads/1/3/0/9/130969693/dejafozif.pdf
    • http://files.homewatchsecurity.co.uk/uploads/1/3/1/4/131437283/rexukorekoniziw.pdf
    • http://files.onceinawifetime.com/uploads/1/3/1/4/131406149/dulibusojo.pdf
    • http://files.parentspeace.com/uploads/1/3/0/7/130738758/17d433ddd5c.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/37342287993.pdf
    • https://cdn.shopify.com/s/files/1/0430/4456/9242/files/kekudowisibemi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/moruwovedopupobex.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/rojilobidokijek.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3132/files/rofutupadoputer.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/suxukadefagujivufiwuzaf.pdf
    • https://cdn.shopify.com/s/files/1/0427/9877/6487/files/20958332104.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/30898665142.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/nokurovetuse.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/81482042810.pdf
    • https://cdn.shopify.com/s/files/1/0435/6125/5073/files/potuneb.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_off000067c0.bin
0cb2251ebe4ba04cf832a28626defb8cfb9e935691a2941a53b1da4f51eb69ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C0 4948 bytes
font_01_sfnt_off00007893.bin
6fc6189555e91c6abcf887e64cb2f5ef39a0e669fe65d5161a3a7cd01d9525a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7893 10088 bytes

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