Malicious PDF — malware analysis report

Static analysis result for SHA-256 2965714e5b5cb0f1…

MALICIOUS

PDF

43.2 KB Created: 2020-08-21 14:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d94f2b3c7694b695855bf96c793e8cc SHA-1: 6f4e491c770570ef621806039ceb9bad0a0101c1 SHA-256: 2965714e5b5cb0f1311e5cc9a10cc91de42102ff219deba62c01a6cf31dd5388
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=jingle+bells+piano+sheet+hard'. Additionally, it exhibits a PDF link farm heuristic, with numerous links pointing to various PDF files, many hosted on Shopify. The document body, though heavily obfuscated, contains references to 'jingle bells piano sheet hard' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The primary IOC is the redirector URL, which is likely used to funnel victims to a malicious site.

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=jingle+bells+piano+sheet+hard
    • http://toronifot.beautifuljourneybirthservices.com/uploads/1/3/1/4/131407552/gebakuv-bajepigexovut.pdf
    • http://files.simchatalya.com/uploads/1/3/1/3/131383283/d7d12660537.pdf
    • https://cdn.shopify.com/s/files/1/0432/7748/4196/files/avast_registration_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/2539/2035/files/mrityunjay_kadambari_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/2671/6584/files/44705807370.pdf
    • https://cdn.shopify.com/s/files/1/0432/7496/1059/files/93011173024.pdf
    • https://cdn.shopify.com/s/files/1/0434/1163/6381/files/gymnopedie_1_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0440/7335/3366/files/wuvemaverelivadabejanasu.pdf
    • https://cdn.shopify.com/s/files/1/0436/8151/3625/files/name_change_affidavit_for_passport.pdf
    • https://cdn.shopify.com/s/files/1/0460/1590/5951/files/68055852287.pdf
    • https://cdn.shopify.com/s/files/1/0439/2216/1832/files/kojigil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0654/9406/files/zoderokalujisajukelajolo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/danitalugurika.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_off0000554c.bin
924d76a4ae952a0612305dff1817bdc835b45b5782882db669728b3b51b49d59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x554C 5348 bytes
font_01_sfnt_off0000675b.bin
af3071568ace1133c51f71af4e3df5743d3c0958c51eee193c7f9528870dca89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x675B 10348 bytes
font_02_sfnt_off00008afa.bin
d973db94ba2c448c661c26f08d051ac794e7cb4f3c7daa33c2141e8036f071b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFA 16100 bytes

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