Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eccc6f8680a0b5f…

MALICIOUS

PDF

45.7 KB Created: 2020-08-08 00:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cde4e68c6bddb5319c9db30194bd2fe SHA-1: cb7ad3d1f0ca92573b48a3f2dbd03c6951b73369 SHA-256: 8eccc6f8680a0b5f52824450407c43c4d22ab2147e459edf43b3adb0b3cf5564
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=english+grammar+interview+questions+and+answers+pdf'. This URL is designed to redirect users to potentially harmful content. The document body also contains this URL, reinforcing the lure. The presence of numerous other PDF links, while many are benign, suggests a link farm strategy to improve search engine visibility for malicious 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.com/pify?keyword=english+grammar+interview+questions+and+answers+pdf
    • http://files.adamjchong.com/uploads/1/3/1/3/131379939/f51641266355176.pdf
    • http://files.ericaannphotography10.com/uploads/1/3/1/6/131607712/6777856.pdf
    • http://files.tntgreatfalls.com/uploads/1/3/0/7/130775653/jenezudaxaro-waxikebibupo-gosolukisiweziw-fefuwajadijo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/14657243979.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/forup.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8551/files/30927672770.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/ernst_cassirer_philosophy_of_the_enlightenment.pdf
    • https://cdn.shopify.com/s/files/1/0449/4534/2619/files/kik_slut_usernames.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8242/files/asymptotes_of_logarithmic_functions.pdf
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/53773171898.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tipibag.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1567/files/ramerika.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/rafebuxulolezewilifu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/70008433166.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_off00007323.bin
79cda825b3fc84ecc4f8bb266546058ecd263ea165ad034f7b0e03297d490e1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7323 5688 bytes
font_01_sfnt_off00008660.bin
e191cdfd3dd18365422c9c2aa3d333cefa5c3a58cca0260abdf6d0bba4890119		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8660 10372 bytes

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