Malicious PDF — malware analysis report

Static analysis result for SHA-256 5280d5b3bb23ca4d…

MALICIOUS

PDF

44.4 KB Created: 2020-08-05 04:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9a437c2f7e497e7eab6d847f34f60fc SHA-1: af650db05fae1de2cb45dfc5c2c705a37b5b2dfe SHA-256: 5280d5b3bb23ca4dcbd54602fb68e238f56fbbcc20da00a19e83fd03df8ae4b4
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the string 'Civil engineering book pdf bangla' and the malicious URL 'https://ttraff.cc/pify?keyword=civil+engineering+book+pdf+bangla', suggesting a lure for users seeking specific content. The PDF_SEO_LINK_FARM heuristic indicates a mass of external links, further supporting the malicious intent of redirecting users to potentially harmful sites.

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=civil+engineering+book+pdf+bangla
    • http://files.chanelyourthoughts.com/uploads/1/3/2/7/132740296/383191e8ad8cefd.pdf
    • http://files.journeyfromjourneyto.com/uploads/1/3/1/4/131413550/267903.pdf
    • http://files.theapostolicnet.org/uploads/1/3/1/0/131070872/0666ef3ef.pdf
    • http://files.luskccart.com/uploads/1/3/1/4/131482950/9523935.pdf
    • http://files.theapostolicnet.or
    • https://cdn.shopify.com/s/files/1/0433/4845/9673/files/19812967367.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/kurasidison.pdf
    • https://cdn.shopify.com/s/files/1/0432/6827/6384/files/530012809.pdf
    • https://cdn.shopify.com/s/files/1/0437/8483/1125/files/harkins_southlake_town_center_14.pdf
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/xonibizixiwawom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdf
    • https://cdn.shopify.com/s/files/1/0435/2140/9184/files/vepubivezixeradavejizoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/gabanudidi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/jevuvuzile.pdf
    • https://cdn.shopify.com/s/files/1/0438/9502/9915/files/xikel.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5164/files/totijatixabu.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_off00005ca7.bin
5b4cdd44bdb8d3cd48d0d06c79f6925c92ee68e14d65ae4c70b68b920210af83
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA7 5200 bytes
font_01_sfnt_off00006e66.bin
2d35fe1b112251630f6c3e185fb4bf58c6327cea99f60afab3ca0473214b5b30
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E66 2116 bytes
font_02_sfnt_off00007832.bin
a83373bd904ddd2e60054c409bd7553689cef41c59e35a5be82c28b2bdc9dcfe
pdf-font-stream PDF embedded font (sfnt) at offset 0x7832 14100 bytes