Malicious PDF — malware analysis report

Static analysis result for SHA-256 d44d7d54c71a2d08…

MALICIOUS

PDF

48.6 KB Created: 2020-09-02 20:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47cbda73e6940c5c4aae309363d22823 SHA-1: d582a4b051259a66510dab91bd743919f568b7dd SHA-256: d44d7d54c71a2d085dd389c33e6f95be54344ce873a747c55de37163e2551dad
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Seagate blackarmor 440 manual' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a further stage of the attack. The presence of numerous external links, many pointing to static.usrfiles.com, indicates a link farm strategy to potentially improve search engine ranking or distribute 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=seagate+blackarmor+440+manual
    • https://static.usrfiles.com/ugd/0a593f_2aad88736d69488391253c4b82dde2b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e555a8fb9454e799ab6494884fca9d0.pdf
    • https://static.usrfiles.com/ugd/5ea4d5_7333b0aee8514f5589a9e3583f70350d.pdf
    • https://static.usrfiles.com/ugd/b463f2_a228cdaa7b864070a49ad5f6504d7d7e.pdf
    • https://static.usrfiles.com/ugd/11f207_51850ea6fd784db597c46631966ae42a.pdf
    • https://static.usrfiles.com/ugd/e1c37d_98fb82b9191c43ebb96222cbdde9f4a9.pdf
    • https://static.usrfiles.com/ugd/5cd33b_947fdd2ee21c43d88696700f9f38fea0.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/the_startup_playbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9430/files/76870110231.pdf
    • https://static.usrfiles.com/ugd/957c7b_f6dfd048d1284ac39c161ebffb1f7788.pdf
    • https://static.usrfiles.com/ugd/451461_c5f55038b79e4565b8f4924490e1cd9e.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a32.bin
8d7bdfe89021885c87d5ab8fd175ecd3a0c4e06e9376efb4fe1de5a85fd977ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A32 5480 bytes
font_01_sfnt_off00007ccc.bin
996f118e751ab9651e56bd4e66262ecc655721a8a9bf19dfc7eb38475eafd4dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCC 10280 bytes
font_02_sfnt_off0000a042.bin
d1a4c78ef556d8252eaaeead95fd6e0540edb04596780bf3770e55fda0b1f776		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA042 16196 bytes

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