Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3f325eb0165646d…

MALICIOUS

PDF

50.5 KB Created: 2020-08-30 18:39:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47c55a6a6552398ec8c50eff0552fbf6 SHA-1: c9a4847ce08d5c1b927a757dfcbd7d72c21a0665 SHA-256: c3f325eb0165646d77796ff7394d7ee824b585fc037f75876432bca811ca4b08
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a direct link to a redirector URL, disguised with a seemingly innocuous keyword. The heuristic firings indicate that the PDF is designed to redirect users to malicious infrastructure. The embedded URLs suggest a phishing or malware distribution attempt, leveraging a lure of 'frozen elsa coloring pages to print'. No scripts were extracted from this sample.

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.ru/wix?keyword=frozen+elsa+coloring+pages+to+print
    • https://static.usrfiles.com/ugd/0a052f_45d181c423e24c9895bc33aa31834d4c.pdf
    • https://static.usrfiles.com/ugd/2486b5_287f935113054f00bc4c7ffb66e03f07.pdf
    • https://static.usrfiles.com/ugd/b8c837_15a4cccd73704f5798b33229dc70b888.pdf
    • https://static.usrfiles.com/ugd/b8c837_eeb7b8ec05764115b8b8a780d8230f3b.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_cb358e03819b42698360fd8dad602adc.pdf
    • https://static.usrfiles.com/ugd/b8c837_1fbe7438b0204febb7cdcfe7cc1f4c31.pdf
    • https://static.usrfiles.com/ugd/f0f215_50ebc98fe15d4b1ca6c0da4f05446956.pdf
    • https://static.usrfiles.com/ugd/625844_3099c8dbb2f449beba4b4ff971e1f6b2.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_2f2dffa108da4575bcd8ff9f15016df4.pdf
    • https://static.usrfiles.com/ugd/10a4aa_c3cd35cd7f5a4cd0820bace1deec8270.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/atomic_structure_of_first_20_elements_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/kukri_knife_template.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_off00008805.bin
46fd6329885ac0905bc880e63d2805ccc820d0487bb54331d5e047d805ae1dbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8805 5108 bytes
font_01_sfnt_off00009980.bin
14de2b508c174c822193a2514d81f176e84139ee79330e53d8914cb6607b3309		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9980 10892 bytes

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