Malicious PDF — malware analysis report

Static analysis result for SHA-256 3808454ed0277951…

MALICIOUS

PDF

41.5 KB Created: 2020-08-21 09:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6290a958fc0aa472ea69404f02726ec1 SHA-1: f23a43697195b26d957c483479035a26d6d15d16 SHA-256: 3808454ed02779518a35d39e5f104306892ee3d1f5bc0106a97c745faa3e03bc
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm with 16 external PDF links, one of which redirects to malicious infrastructure at ttraff.ru. The document body, though heavily obfuscated, contains the same malicious URL and benign-looking PDF titles, suggesting a lure to disguise the malicious redirector. The primary attack pattern involves social engineering users to click the malicious link, likely leading to further malware download or phishing.

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=brazil+visa+application+form+pdf
    • http://files.amyjlane-instructional.com/uploads/1/3/2/7/132740467/525610.pdf
    • http://midudew.electhicks.com/uploads/1/3/0/7/130775734/8051504.pdf
    • http://files.globalexplorertravel.com/uploads/1/3/2/3/132303151/noragejafe.pdf
    • http://wuwego.normanmuseum.org/uploads/1/3/1/3/131380828/4d573fef8.pdf
    • https://cdn.shopify.com/s/files/1/0439/2452/1128/files/95480543798.pdf
    • https://cdn.shopify.com/s/files/1/0437/1133/2503/files/discuss_the_ontological_argument_for_the_existence_of_god.pdf
    • https://cdn.shopify.com/s/files/1/0438/2402/1664/files/52032922993.pdf
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/playground_sessions_crack.pdf
    • https://cdn.shopify.com/s/files/1/0435/5915/7921/files/subefejo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/54218273667.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/719714918.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7624/files/momotajuganoso.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/47156338755.pdf
    • https://cdn.shopify.com/s/files/1/0435/1806/6842/files/busofego.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/tukagazatorawusawujeg.pdf
    • https://cdn.shopify.com/s/files/1/0438/1674/7170/files/pdf_writer_for_mac_free.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_off0000640c.bin
981d8133cc5c1c7e46893a2d2f27346bcdec37e455473a2044437946532433e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640C 5460 bytes
font_01_sfnt_off0000768b.bin
0a04bdfb3dc1c2553983385a9e501a6e7e6fbb26874490e0790bf9520bdb0eac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x768B 10180 bytes

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