Malicious PDF — malware analysis report

Static analysis result for SHA-256 f333f7c86b124bc4…

MALICIOUS

PDF

40.9 KB Created: 2020-08-02 16:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dc8aa0648e1b7e70053bde7fae12772 SHA-1: 4cae89d2ed54e8c27acd7d97420c34acdcf4e36d SHA-256: f333f7c86b124bc4e181f222c81c7727b6f2864d82c53f0175a48abeaac749d6
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a PDF link farm containing 30 external PDF links. One of these links, https://ttraff.ru/pify?keyword=primal+surge+mtg, is a known malicious redirector. The document body contains garbled text but also includes the URL and keywords associated with the redirector, suggesting an attempt to lure users to malicious content through a link farm.

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.ru/pify?keyword=primal+surge+mtg
    • http://files.midviewfootball.com/uploads/1/3/1/1/131164152/4664465.pdf
    • http://files.taratraits.com/uploads/1/3/2/3/132303264/zewib.pdf
    • https://cdn.shopify.com/s/files/1/0429/9282/8579/files/kugewiwupozonita.pdf
    • https://cdn.shopify.com/s/files/1/0428/4062/1222/files/16241601541.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9020/files/kabakevozokefewe.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0729/files/sovukojireroluboranuside.pdf
    • http://files.mesweeney.people.ua.edu/uploads/1/3/2/6/132682829/komime.pdf
    • https://cdn.shopify.com/s/files/1/0432/6775/2100/files/4914019140.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3041/files/ledixunugenopel.pdf
    • https://cdn.shopify.com/s/files/1/0437/8722/3198/files/70563128474.pdf
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/semozurizowemor.pdf
    • https://cdn.shopify.com/s/files/1/0434/5492/2902/files/kawas.pdf
    • https://cdn.shopify.com/s/files/1/0435/5666/7551/files/31226596489.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/xasati.pdf
    • https://cdn.shopify.com/s/files/1/0433/5963/3559/files/np_random_randn.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_off0000610d.bin
c8e1c638bf16319527c7c58e1fdbb15f019b13670ccb019134ff99e92183c2bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x610D 5008 bytes
font_01_sfnt_off000071f8.bin
7b365671feac7d6ff6501cdbbd8384b993d7f5a8b7ecff8c317dfc1c434a2b17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F8 10968 bytes

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