Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3691f846cc8e452…

MALICIOUS

PDF

60.4 KB Created: 2020-08-30 02:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c674d732f8de9a52cb0fbcf21a43c27 SHA-1: 30c79ccbfbfe3cee50c59eacc1d009259e42efab SHA-256: b3691f846cc8e452d53ce3cf2a470384c62387bae6fdf1224f200716b518862f
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain the URL 'https://ttraff.cc/wix?keyword=rx7+buyers+guide', which is flagged as malicious. This suggests the document's primary purpose is to lure users to this malicious site, likely for phishing or to download further 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.cc/wix?keyword=rx7+buyers+guide
    • https://static.usrfiles.com/ugd/21e6f2_6f426e3db1de40e1945481b4fa4f35f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_50dd207bfee7435e9a2ca0d5fbc1986b.pdf
    • https://static.usrfiles.com/ugd/b8c837_2dcd38eafd6a41e98a63dd022eb47498.pdf
    • https://static.usrfiles.com/ugd/7198c1_777a89e4207f45e998a7f830486c9ba2.pdf
    • https://static.usrfiles.com/ugd/b8c837_96b2e90230c841c2ac1b7b735ba3c03a.pdf
    • https://static.usrfiles.com/ugd/1cfe37_64ba484f8f694ac3a3df3525d92b699e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d746cacea8cd4c9a86ccd86b9cf76171.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c315e1065d446e2ae67cf8361e2fa41.pdf
    • https://static.usrfiles.com/ugd/b8c837_682d915c828e49ccae42f5eabca10abc.pdf
    • https://cdn.shopify.com/s/files/1/0433/5026/1915/files/green_technologies_for_wastewater_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0431/6777/6919/files/que_son_los_alcanos.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/33501243392.pdf
    • https://cdn.shopify.com/s/files/1/0433/7251/1386/files/speedy_current_affairs_2020_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7637/files/surah_ar_rahman_arabic_bangla.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_off0000a6d0.bin
21ceada173a06b10c1522d239caa7da688eef6f39e15c5e508cb0b8883069237		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D0 5148 bytes
font_01_sfnt_off0000b873.bin
99b8ee19a0119d86f5bb7a19299e617e94af26e30b6d7358b87161c28d0267aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB873 13996 bytes

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