Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c952aa231572c1…

MALICIOUS

PDF

46.3 KB Created: 2020-08-05 01:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 956bdc7c1c5c653e1d35b75aaea57536 SHA-1: 81241aed5dc03fbcf08fdda73fef823efc6c42f2 SHA-256: c9c952aa231572c16f206502e011d7136399a474ae201851738e8de3b0a23c14
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to shopify.com domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a link farm or SEO poisoning technique used to distribute malicious content. The document body, though heavily obfuscated, contains the target URL, indicating an attempt to lure users to a malicious site under the guise of providing useful information.

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=quantitative+aptitude+solving+tricks+pdf
    • http://files.dorabramden.com/uploads/1/3/1/3/131382141/3729828.pdf
    • http://files.estellessweetitchblankets.com/uploads/1/3/1/4/131409170/tixavaxanepuluxuvit.pdf
    • http://files.robertblancia.com/uploads/1/3/2/3/132303068/a5bf5.pdf
    • http://files.liveruralaustralia.com/uploads/1/3/0/9/130969761/kabutakaba.pdf
    • https://cdn.shopify.com/s/files/1/0434/9621/0594/files/73981508858.pdf
    • https://cdn.shopify.com/s/files/1/0438/9309/6600/files/nepasofodipe.pdf
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/76794797029.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/22180090834.pdf
    • https://cdn.shopify.com/s/files/1/0427/3173/3159/files/biwixetizagurutodivopoze.pdf
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/25729399106.pdf
    • https://cdn.shopify.com/s/files/1/0431/5152/4008/files/juxedifupopofiburi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2166/3397/files/reddit_bodyweight_fitness.pdf
    • https://cdn.shopify.com/s/files/1/0428/0975/3767/files/5201991910.pdf
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/8716273583.pdf
    • https://cdn.shopify.com/s/files/1/0433/3010/9593/files/rizuzukagowuzukituno.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d0e.bin
739a2949ce17f4d5634ff79b4e83ca9cc01541c889aa6321234beff93535dead		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0E 5508 bytes
font_01_sfnt_off00007fdb.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDB 1800 bytes
font_02_sfnt_off00008869.bin
130b2276217c7a58dc42eed77e55e1189af794d521354e42a004a089ba08bb76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8869 10480 bytes

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