Malicious PDF — malware analysis report

Static analysis result for SHA-256 b601e95c407410df…

MALICIOUS

PDF

46.0 KB Created: 2020-08-04 06:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc984abbfc61a22fba1b5979c099c41a SHA-1: 1196ed87b8ffb69e5333180e641e95464fb92fdd SHA-256: b601e95c407410df3921f82b7251ae2985c6ecc4ce69afe313b1cf8f2dd928c6
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=abbreviation+dictionary+pdf', which is also listed as a malicious redirector. The ML classifier strongly supports the malicious verdict. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=abbreviation+dictionary+pdf
    • http://files.thegrovecg.com/uploads/1/3/0/7/130739043/xeloweg_kisofixadef_nudalewub.pdf
    • http://files.hbnaz.org/uploads/1/3/1/4/131407152/5411203.pdf
    • http://files.rinfang.com/uploads/1/3/1/3/131384249/wutik.pdf
    • http://files.meandmyfriendspreschool.com/uploads/1/3/2/6/132681851/jamewewutudufapip.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5289/files/17851216771.pdf
    • https://cdn.shopify.com/s/files/1/0439/0499/1400/files/mass_media_as_agent_of_socialization.pdf
    • https://cdn.shopify.com/s/files/1/0437/3748/1365/files/71491749864.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/muwurojij.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/jimolak.pdf
    • https://cdn.shopify.com/s/files/1/0435/7170/8065/files/2156832021.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0944/files/gevonisabavizemugopadizod.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/94396941802.pdf
    • https://cdn.shopify.com/s/files/1/0429/1887/1207/files/96362443540.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_off000069b1.bin
d19e857fa376ce0d37bd4d475c3170edc94c7db0dc13406730dd33524855cb45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B1 5016 bytes
font_01_sfnt_off00007acf.bin
b49ab33ddbf6050bc378ec2808c15d52480cf430c320f95bad591c02dddfa18d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACF 10000 bytes
font_02_sfnt_off00009d05.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D05 4324 bytes

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