Malicious PDF — malware analysis report

Static analysis result for SHA-256 58144af962cce535…

MALICIOUS

PDF

43.2 KB Created: 2020-08-21 14:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6179142fcca2b8c2acf557d8cde85248 SHA-1: 850fe9bb20202ee100b3ff2aea85a8efbe9cf987 SHA-256: 58144af962cce5354cbf9198d6a19120b91816ad57108ce81e3e4a67de293b2c
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic fired, revealing a large number of embedded external links, with the primary redirector URL being https://ttraff.ru/pify?keyword=lagu+ambyar+cover+akustik. The document body, though heavily obfuscated, contains this URL and other Shopify-hosted PDF links, suggesting a link farm designed to distribute malicious content or phish users.

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/pify?keyword=lagu+ambyar+cover+akustik
    • http://zilaso.massapequahistoricalsociety.org/uploads/1/3/2/8/132815296/7566851.pdf
    • https://cdn.shopify.com/s/files/1/0433/2191/7598/files/jovafizetukegiso.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/rewisezaburivujugasuvu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/invertebrates_worksheet_grade_6.pdf
    • https://cdn.shopify.com/s/files/1/0430/8271/1201/files/41430543534.pdf
    • https://cdn.shopify.com/s/files/1/0429/6327/1833/files/81801999922.pdf
    • https://cdn.shopify.com/s/files/1/0431/9418/7933/files/96938538973.pdf
    • https://cdn.shopify.com/s/files/1/0430/9945/5642/files/xowumagobatis.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/33348984288.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2500557594.pdf
    • https://cdn.shopify.com/s/files/1/0434/3467/2285/files/loan_agreement_template_microsoft_word.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_off00005423.bin
314e8a9d3db006beb04edc364f37ae0be793d7484f5f261725edffcfd88e35ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5423 5396 bytes
font_01_sfnt_off00006680.bin
97cc62bcd75e1240d443257676c0df83749f40926cdc0217bb6f3cb88038efc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6680 10556 bytes
font_02_sfnt_off00008ae3.bin
97d284a3855420cdbdae34860f31dacc38605590ea495453bf7f5ba3a9d42ecf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE3 16204 bytes

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