Malicious PDF — malware analysis report

Static analysis result for SHA-256 a79812582f2fef9f…

MALICIOUS

PDF

70.3 KB Created: 2020-08-30 23:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3adfbc6fe024e1821ee5598698bad353 SHA-1: cf5a2aacdcc4f9d955149aba5022ef7a07900b6e SHA-256: a79812582f2fef9f66402c1e2d81fc2377d54112712b7bb656161c5620a89812
120 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to trick search engines and users into visiting malicious infrastructure. The primary malicious URL, https://ttraff.cc/wix?keyword=design+of+cities+edmund+bacon+free+p, is identified as a redirector. The document body, though heavily obfuscated, contains references to this URL and other benign-looking PDF links hosted on Shopify, likely to lend legitimacy to the SEO spam.

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/wix?keyword=design+of+cities+edmund+bacon+free+p
    • https://cdn.shopify.com/s/files/1/0445/3974/0319/files/noes_de_administrao_financeira.pdf
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/ordo_hemiptera.pdf
    • https://cdn.shopify.com/s/files/1/0458/1258/0518/files/72894715997.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7048/files/67312930665.pdf
    • https://cdn.shopify.com/s/files/1/0429/1336/6182/files/30585738067.pdf
    • https://cdn.shopify.com/s/files/1/0429/5173/7498/files/91758191023.pdf
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/astro_boy_games_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/4763862689.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7384fd29ade4caf967648eed7c28ad5.pdf
    • https://static.usrfiles.com/ugd/b8c837_73d44f7e83164624909aa3b40919c01f.pdf
    • https://cdn.shopify.com/s/files/1/0443/0387/6252/files/blackpink_whistle_mp3_muzmo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4410/0506/files/kleppner_and_kolenkow_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3041/files/nobadujonovorogenaro.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/avery_template_5160_for_google_docs.pdf
    • https://cdn.shopify.com/s/files/1/0435/3681/0135/files/ejercicios_con_adverbios_de_frecuenc.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_off0000d5e0.bin
55d1a15df890e346f9efdf3ff7e388d34a1f0a487b51d488c76579e0e5c7fd4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E0 5584 bytes
font_01_sfnt_off0000e8bb.bin
b0dd4a0e6ad6bebde6215c5087812a44c46ba9644ee7a8453e8d070efee0cb1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BB 10408 bytes

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