Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e9521cbb0c7d11…

MALICIOUS

PDF

65.1 KB Created: 2020-08-30 23:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b82cf5710b80f753c7ae0c818452be4 SHA-1: 4013419136dac0e7f8bc7cbeef4163043e3c2543 SHA-256: b6e9521cbb0c7d11711481dfff947f5f09144f318bf7d47882bc74479f56bf70
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=wholesale+paper+suppliers'. This URL is presented within the document body, suggesting a phishing or scam attempt disguised as information about wholesale paper suppliers. The PDF also contains a link farm heuristic, indicating a large number of external links, many hosted on Shopify and static.usrfiles.com, likely for SEO manipulation or to obscure the malicious redirector.

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=wholesale+paper+suppliers
    • https://cdn.shopify.com/s/files/1/0431/0102/8503/files/93848954903.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/neuralgia_de_arnold_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0432/5939/6254/files/dusoda.pdf
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/12928208779.pdf
    • https://cdn.shopify.com/s/files/1/0430/5905/2706/files/65829387473.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/91897271330.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_d6d51a1fbdfd4e848407286950822392.pdf
    • https://static.usrfiles.com/ugd/07625c_ea99dc2c550a4613b226dbfffcf30ea8.pdf
    • https://static.usrfiles.com/ugd/9e41f0_7168b357131143f296109710b457b6d3.pdf
    • https://static.usrfiles.com/ugd/eb4c03_d672e7e17396475393737f0170f5a3c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_66acace23f7948cab8c857045f26fa7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_9fc565d8a5fe4862abe0ccba70beb78f.pdf
    • https://static.usrfiles.com/ugd/b8c837_44b688098da540dca333d2bb75b5df94.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_off0000c20d.bin
4ec50cb875a885eef66a35bb1387751f9a1137fb141b6f274266ab3bd4777ec6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC20D 4920 bytes
font_01_sfnt_off0000d2d0.bin
bdc63e1c72a058a078b96d5f63f5f2db7527547aa615265838203c203cec82cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D0 10728 bytes

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