Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd13647e81dc4688…

MALICIOUS

PDF

62.2 KB Created: 2020-09-02 04:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0284a4dfacc1e7e6a0a03e58531e9abf SHA-1: 47301c6ce967e3034f7beeb01aaa4b5af27ef1b9 SHA-256: fd13647e81dc4688cc39fc5aa4d3ece9da7b284cdcd6aa4a48075b8582cf9eda
150 Risk Score

Malware Insights

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

The PDF contains numerous links, identified as a link farm, with one critical heuristic firing indicating a redirect to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=answer+to+impossible+quiz+2+number+53', which is also flagged as a malicious redirector. This suggests the PDF's primary purpose is to redirect users to a malicious site.

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.cc/pify?keyword=answer+to+impossible+quiz+2+number+53
    • https://cdn.shopify.com/s/files/1/0431/7157/8024/files/4153820452.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tadigepulimo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6209/1167/files/wofatijan.pdf
    • https://cdn.shopify.com/s/files/1/0432/8118/6971/files/19013925664.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/texte_des_accords_d_evian.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_399eb957c2474742a3ff847fda13055f.pdf
    • https://static.usrfiles.com/ugd/b11f6d_1864cfee05554b79b9f5226bc6872caa.pdf
    • https://static.usrfiles.com/ugd/bf650e_0af07941e4744adb876b4843a09c5105.pdf
    • https://static.usrfiles.com/ugd/ace02d_611e2329b5eb4f91be91aae18abb257e.pdf
    • https://static.usrfiles.com/ugd/f8de3e_2f2acfea9e54457e927b22ea7bbe9f9e.pdf
    • https://static.usrfiles.com/ugd/8cbfce_632ff3b3061843aea7677baa50b23d93.pdf
    • https://static.usrfiles.com/ugd/de02f3_ac3ce04fe138401f8af8531186e3b390.pdf
    • https://static.usrfiles.com/ugd/9904c2_937def613c714a088f757716f4626532.pdf
    • https://static.usrfiles.com/ugd/b8c837_91508e7358304576842ae55e365186eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_879b8725eb8b4873a9972f7b9620de61.pdf
    • https://static.usrfiles.com/ugd/b8c837_2cb22a747ba14cd59e1762af545997dd.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000928a.bin
85bce6f309d13de948b4432072678c0bacca3cc3ce9f3c8624cd7c80efd569e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x928A 5572 bytes
font_01_sfnt_off0000a57e.bin
c9c850e9c351ce199d5e9d1c42a783cd39d33267a74ccb43d8a2fed304f07254		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA57E 1796 bytes
font_02_sfnt_off0000ae09.bin
b13d07a05e2f501afac79adadb17f8320d0a65761dd5beb4a4a437c0a17d9f09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE09 10656 bytes
font_03_sfnt_off0000d27b.bin
457059b91fb3626dda572a603889570f882d04623302de655ff3bb2fa76de208		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD27B 16528 bytes

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