Malicious PDF — malware analysis report

Static analysis result for SHA-256 345d7fd9c4f8c793…

MALICIOUS

PDF

49.7 KB Created: 2020-08-15 06:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bf2950f03369b333ebdd1ed0d1fc7bd SHA-1: 9fae9781a7cbee9148fbbb61339be7f72be10187 SHA-256: 345d7fd9c4f8c79305b2872f8e7806170c7861c270b18865845fc8a251187e2c
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 redirect users to malicious infrastructure, specifically disguised as a free download for piano sheet music. The primary malicious URL identified is https://ttraff.ru/wb?keyword=piano%20sheet%20music%20pdf%20download%20free. The document body, though heavily obfuscated, contains references to this lure and other embedded URLs, indicating a social engineering attempt to drive traffic to potentially harmful sites.

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/wb?keyword=piano%20sheet%20music%20pdf%20download%20free
    • http://pupolosa.stjosephsoriskanyfalls.com/uploads/1/3/1/0/131070611/tasojezokoweke_minasalozaf_mifuguzuza_vafunik.pdf
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/biological_species_concept.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/dizotimebidelavizogada.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/49269718464.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94215193789.pdf
    • https://cdn.shopify.com/s/files/1/0432/8072/8224/files/89645932942.pdf
    • https://cdn.shopify.com/s/files/1/0430/3139/6501/files/lolevotigupedemiban.pdf
    • https://cdn.shopify.com/s/files/1/0430/3188/8021/files/84682643032.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/zadixogojipovebuwozesatox.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_off0000703e.bin
6541fc490a868cbcf2825385c00611f926ac7f2497c830a8b3a0d6f3537620be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x703E 5488 bytes
font_01_sfnt_off000082c7.bin
ccdd633370348c238df373cd0d243b9dbc80dfff3d0b387cfc56a9f55a927c29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82C7 9860 bytes
font_02_sfnt_off0000a4c2.bin
d973db94ba2c448c661c26f08d051ac794e7cb4f3c7daa33c2141e8036f071b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4C2 16100 bytes

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