Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f5385839e42847f…

MALICIOUS

PDF

39.9 KB Created: 2020-07-28 03:30:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bc8d405632ea092c45a80abbf9c2eba SHA-1: 4cfbb18dbba76f4dcb567172e1574cef67ec217f SHA-256: 8f5385839e42847f7c171057d630d95671cdfcde2d779001c681ce63b3d53010
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic. One of these links, ttraff.com, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Aiou admission form 2019', suggesting a lure to attract users to click on the malicious links.

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=aiou+admission+form++2019
    • http://files.futurescapes21c.com/uploads/1/3/2/6/132682868/jijodox.pdf
    • http://files.2ndchancehypnotherapy.com/uploads/1/3/2/6/132696214/655720.pdf
    • http://files.tancarrphoto.net/uploads/1/3/1/0/131070001/1227298.pdf
    • http://files.mastudentnurses.com/uploads/1/3/0/7/130776607/nokogajowabobekexu.pdf
    • http://files.ohiothunderbasketball.com/uploads/1/3/1/3/131381204/gakovabivifazirivo.pdf
    • http://files.ohiothunderbask
    • https://cdn.shopify.com/s/files/1/0433/3587/6776/files/dezoke.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7501/files/9266175548.pdf
    • https://cdn.shopify.com/s/files/1/0432/4658/3976/files/vawexesejeber.pdf
    • https://cdn.shopify.com/s/files/1/0433/0402/6280/files/80582733165.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9659/files/14723884614.pdf
    • https://cdn.shopify.com/s/files/1/0431/9327/0429/files/73306835411.pdf
    • https://cdn.shopify.com/s/files/1/0431/0604/2013/files/nenokigilomezerikar.pdf
    • https://cdn.shopify.com/s/files/1/0430/7487/9641/files/29069660497.pdf
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/jefuzadodijifipo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/88541659137.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.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_off000060ec.bin
565501987baac5648db7cf9730b5c845bd4f93fba700affdedddb44f23f40c91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60EC 5176 bytes
font_01_sfnt_off00007254.bin
18fb9b205090219da6f47b341972c47d4fcb4bce81ccac1aeaaf851b23400a6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7254 9516 bytes

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