Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f8198ba5e5a50f…

MALICIOUS

PDF

84.8 KB Created: 2020-08-03 10:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 552f1fe49a321c8ce05f3446cb25d49c SHA-1: 453f60e3ce9d81d935b1448dfe623acf47912b87 SHA-256: b1f8198ba5e5a50f1555922651af18f01b3e55fdb079d79bf416d5e53849c978
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of the primary links, https://ttraff.cc/pify?keyword=array+sort+java, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to 'array sort java' and the URL, suggesting a lure to a potentially malicious site disguised as content.

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=array+sort+java
    • http://kavijik.emimendoza.com/uploads/1/3/1/4/131409090/4763634.pdf
    • http://files.lilibit.com/uploads/1/3/0/7/130775084/9485470.pdf
    • http://files.cheshirecraftsmen.org/uploads/1/3/1/4/131406527/wizejufaxusebagazasa.pdf
    • http://files.maritimeheritagepress.com/uploads/1/3/1/4/131454221/0b10d.pdf
    • https://cdn.shopify.com/s/files/1/0433/0255/1716/files/61343715721.pdf
    • https://cdn.shopify.com/s/files/1/0427/7963/9967/files/duregeluzobifatuginoledix.pdf
    • https://cdn.shopify.com/s/files/1/0430/5849/5639/files/jilam.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4150/files/foset.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/1235973502.pdf
    • https://cdn.shopify.com/s/files/1/0435/7606/6207/files/43321945681.pdf
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/xularobob.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/gezinarowatafixozugedu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/dibugenuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/fifarobup.pdf
    • https://cdn.shopify.com/s/files/1/0430/6000/2967/files/linux_application_development.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/wapijovuminavadowebubo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/41433307037.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_off000109cd.bin
b5547cb80ac5bfb12a4258ab046b5cdba4fce58f7aa0d65cd92b79fa0031ded8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109CD 4876 bytes
font_01_sfnt_off00011a81.bin
9bbf2a058390da4ef07cdada01b1a410b75feeba92abc7bb09964fb812330f5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A81 13552 bytes

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