Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c5927d2227b2c9…

MALICIOUS

PDF

51.5 KB Created: 2020-08-09 15:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2bc5efa40e915501eaaa2190c95a17f SHA-1: 339772a63093d6665949ae2f4e4d01769bf86e50 SHA-256: 40c5927d2227b2c9720c8ff4ba65404b4169ba47b70ef5523d6e43afdbac9f7a
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for a 'computer abbreviations list pdf download'. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

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.com/pify?keyword=computer+abbreviations+list+pdf+download
    • http://files.angeecasson.com/uploads/1/3/2/3/132303092/4242498.pdf
    • http://files.fallentreeexhibitions.com/uploads/1/3/1/4/131406258/7727261.pdf
    • http://pojor.cathedralbluffoutfitters.com/uploads/1/3/0/7/130775436/256e6.pdf
    • http://files.mosaicsbysandisykora.com/uploads/1/3/1/4/131406659/rafofagole.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5149/files/doroka.pdf
    • https://cdn.shopify.com/s/files/1/0434/0413/2508/files/pamisuzezoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/java_bank_account_code.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/tejukixudizanolesugevi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5152/2977/files/48057313374.pdf
    • https://cdn.shopify.com/s/files/1/0433/7080/7459/files/16308394875.pdf
    • https://cdn.shopify.com/s/files/1/0434/4535/4658/files/tixosovepubesejupem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jatud.pdf
    • https://cdn.shopify.com/s/files/1/0430/7333/9559/files/wegadamugagod.pdf
    • https://cdn.shopify.com/s/files/1/0431/3668/0102/files/9232677525.pdf
    • https://cdn.shopify.com/s/files/1/0434/6934/0822/files/51487634475.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7118/files/24825346199.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/
    • https://cdn.shopify.com/s/file

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fa0.bin
3789e3863d4d6505d2d0657a51a62c10af20b617a142134a78285403907bd79d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA0 5384 bytes
font_01_sfnt_off000091dc.bin
d81a60b04314d6e42e0bec64f48e3db1cf0c9af356c4c491bc8535ba98441233		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91DC 14852 bytes

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