Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca450ff25799ebc…

MALICIOUS

PDF

40.5 KB Created: 2020-08-09 03:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6639081aab1a6f5a8de463d4654d2864 SHA-1: af5ee32f584f6a8bfb4ce914a23a314a91226ce5 SHA-256: aca450ff25799ebc9408b3410a630fd3aab897b0cdb9f88b1b0724211776ecd5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL is https://ttraff.ru/pify?keyword=barcode+font+download+for+pdf, which likely leads to a malicious payload. The document body, though heavily obfuscated, contains references to the malicious URL and other embedded URLs, suggesting a social engineering attempt to trick the user into clicking the link. 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/pify?keyword=barcode+font+download+for+pdf
    • http://feruwid.westbendpolicedispatch.com/uploads/1/3/1/4/131409090/3062223.pdf
    • http://felemo.alaskasummerinstitute2020.com/uploads/1/3/1/4/131453674/c1d1723.pdf
    • http://files.humptydumptynashua.com/uploads/1/3/1/3/131383771/20e1a413b.pdf
    • http://files.mhecblacon.com/uploads/1/3/1/4/131437351/vasak.pdf
    • http://files.powsfsu.org/uploads/1/3/0/7/130776152/wabulikijelefam-wajuzanela-dozawabi.pdf
    • https://cdn.shopify.com/s/files/1/0440/3075/4966/files/pugulobijamisemebagut.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/14181391388.pdf
    • https://cdn.shopify.com/s/files/1/0428/7011/2423/files/zojubifalaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/dojubijipuxupaniriv.pdf
    • https://cdn.shopify.com/s/files/1/0432/4743/5940/files/mosabesukipewov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0412/4580/files/janon.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/22886975220.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7696/files/css_border_inside.pdf
    • https://cdn.shopify.com/s/files/1/0437/3718/6458/files/ortofon_cartridge_alignment_tool.pdf
    • https://cdn.shopify.com/s/files/1/0432/4546/9858/files/zuvelivojewujapibaja.pdf
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/canon_5d_mark_4_manual.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_off000061b1.bin
21673efa9be3061bc042b7b8a50cd6dd4e29453b85782c74b37df2400ae26afa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B1 5112 bytes
font_01_sfnt_off0000733c.bin
f04b600737161c648550d59e286fd8ea5a62f69d65e34df11351740cea1f79a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x733C 9968 bytes

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