Malicious PDF — malware analysis report

Static analysis result for SHA-256 b14c42ce2f9a35fe…

MALICIOUS

PDF

40.3 KB Created: 2020-08-08 21:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92379a523b5603121d143b8d29927139 SHA-1: 4399c417a11fcc9148336e8c2240b6a08a9e2950 SHA-256: b14c42ce2f9a35fef00a3f7d2de28b14ba5f1f0b4ff21804a040475b638bc12b
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wb?keyword=jrcalc%202013%20pdf', which is flagged as malicious. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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/wb?keyword=jrcalc%202013%20pdf
    • http://files.energyworx2.co.uk/uploads/1/3/1/3/131398097/gijuwemoxapuw-pileduseja-dejoleve.pdf
    • http://files.teaching-entrepreneurship.com/uploads/1/3/2/8/132815181/7138510.pdf
    • http://files.sundevich.com/uploads/1/3/0/7/130740231/xokejisizexivin.pdf
    • http://golagaj.doggiestylezinc.com/uploads/1/3/1/4/131407995/pesebefudupavav.pdf
    • https://cdn.shopify.com/s/files/1/0428/2259/8823/files/92702930534.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/23103052322.pdf
    • https://cdn.shopify.com/s/files/1/0432/6224/7067/files/31640679533.pdf
    • https://cdn.shopify.com/s/files/1/0436/4579/6512/files/folemirunuwimezoxipobi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/zewexa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5266/1912/files/54737823056.pdf
    • https://cdn.shopify.com/s/files/1/0431/5093/4173/files/54502395126.pdf
    • https://cdn.shopify.com/s/files/1/0430/3188/8021/files/84682643032.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/mekesofaxovojujudijaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5471/0427/files/guillermo_gonzalez_microwave_transistor_amplifiers.pdf
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/vuwasugovilajejuke.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/rezidek.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_off00005ea0.bin
00f7796bef4bca828417b9faa4e18594fce92148a0cf1dab14fe8c44f442b810		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA0 5448 bytes
font_01_sfnt_off0000713d.bin
8664aa600d173652060ace7f569719e6ce28cf5f98540728983653ca0057fe65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x713D 10424 bytes

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