Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2176a18564422f…

MALICIOUS

PDF

39.3 KB Created: 2020-08-22 01:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0d2e237b75a1517aaac42fa25ce8e17 SHA-1: 91eb6f6326c79a3b3f2dfd616ce7e51a8a5d0bbf SHA-256: 2c2176a18564422fb0c61af6c0bc0de968d93cd9b8c94887b1f636328a025f73
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a 'Cdc hep b vis form'. This suggests a phishing or scam attempt. The PDF also hosts a large number of external links, many pointing to Shopify, which is characteristic of SEO link farm abuse to improve search engine ranking for malicious content. No scripts were extracted, but the primary malicious indicator is the redirector link.

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=cdc+hep+b+vis+form
    • http://files.sarahkernohan.ca/uploads/1/3/0/7/130776033/670705.pdf
    • https://cdn.shopify.com/s/files/1/0440/6309/6984/files/94603602451.pdf
    • https://cdn.shopify.com/s/files/1/0432/2924/9694/files/half_life_2_cinematic_mod_alyx.pdf
    • https://cdn.shopify.com/s/files/1/0432/6142/7867/files/pidakixoxidap.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/41375191981.pdf
    • https://cdn.shopify.com/s/files/1/0430/3300/2145/files/desaritizunopijoni.pdf
    • https://cdn.shopify.com/s/files/1/0434/8503/6708/files/63969566335.pdf
    • https://cdn.shopify.com/s/files/1/0432/6237/8152/files/jilawejubipasimiv.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/chromatic_harmonica_scales.pdf
    • https://cdn.shopify.com/s/files/1/0434/3857/1670/files/xikafizesareseso.pdf
    • https://cdn.shopify.com/s/files/1/0432/3265/7575/files/xuzilikizokad.pdf
    • https://cdn.shopify.com/s/files/1/0435/4218/4095/files/fajamagodoporos.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_off0000573e.bin
93859a2c1b7949b0a633b325e1d6427e16f4f464e9bcf4dc04bf45e1a7d4e48a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x573E 5256 bytes
font_01_sfnt_off000068fe.bin
1f8c99d1fea7313d72669e03baa49a7c0ff690976520d1bfc09631150105bbfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68FE 12348 bytes

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