Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f2103dba7e39ea…

MALICIOUS

PDF

33.3 KB Created: 2020-09-08 06:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79207ddc0e25f99eb24ab85310cbfe77 SHA-1: 0bf5d6c84e0c96d89782d3d3790d450423dd90c0 SHA-256: 20f2103dba7e39eaa52926bfff0fb6959a85d11947743a55b798ab95960115c9
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a keyword search for "Cimbali m1 manual". The document also contains a large number of links to external PDFs, likely for SEO manipulation or to host further malicious content. The primary malicious URL is https://ttraff.me/wix?keyword=cimbali+m1+manual, which is used to redirect the user. The PDF structure and the presence of numerous external links suggest a lure to a malicious site.

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.me/wix?keyword=cimbali+m1+manual
    • https://static.usrfiles.com/ugd/b8c837_29124ebfb1394f6890e91d97662791a0.pdf
    • https://static.usrfiles.com/ugd/d6af85_74cc83eb74264dbabbcad1aa556fda2e.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_082bf30c9c434253b802bde28a62cd7c.pdf
    • https://static.usrfiles.com/ugd/cc3ca9_c190c0a390874e5ba094ccdfc94e0ac0.pdf
    • https://static.usrfiles.com/ugd/9117e0_183705211b8e4d3c990337f7f3c8bf3e.pdf
    • https://static.usrfiles.com/ugd/bae0a0_bb2f739ba42044d8988de37a45bbdcf4.pdf
    • https://static.usrfiles.com/ugd/c2007e_3d82a148499645ee96743cb27f3b2c8e.pdf
    • https://static.usrfiles.com/ugd/10a4aa_bf8d424e15e74c618ffcffaa2c0a123f.pdf
    • https://static.usrfiles.com/ugd/3826db_5d75de03266f486d96056f34d30a235a.pdf
    • https://static.usrfiles.com/ugd/275374_7edeca203f234a3c8d0822c6b0f092a1.pdf
    • https://cdn.shopify.com/s/files/1/0432/8502/0827/files/caravan_camping_bed_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0460/0424/0543/files/defojilazag.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_off00004652.bin
5e7b33cadb159354c7d2284db389565951623b175ce3f88bbfd3eedfd7d6bba3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4652 4656 bytes
font_01_sfnt_off00005615.bin
d3eae37a7641f6d3d908e1acc6e290b340b2184cd57d16156e19861837bec402		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5615 10504 bytes

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