Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b9dc78f6b8940c2…

MALICIOUS

PDF

38.2 KB Created: 2020-08-30 16:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dc2a6964fd08ac35b8f2fd37d36bdbc SHA-1: 9762a039babeb1c04778ab47046207a7e890551c SHA-256: 1b9dc78f6b8940c2a2cda905b141d2e4c32b872ec7a8f0428bd24b0386b5bac5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links, 'https://ttraff.link/wix?keyword=knightdale+new+homes', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this malicious URL and numerous other benign-looking PDF links, suggesting a lure to a malicious site or a method 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.link/wix?keyword=knightdale+new+homes
    • https://cdn.shopify.com/s/files/1/0429/0206/1215/files/network_cabling_installation.pdf
    • https://cdn.shopify.com/s/files/1/0429/1064/6435/files/2349073118.pdf
    • https://cdn.shopify.com/s/files/1/0430/7763/2161/files/gifivebugejoda.pdf
    • https://static.usrfiles.com/ugd/b8c837_671c8c852bd8412b8eb3fa29d4ddc315.pdf
    • https://static.usrfiles.com/ugd/b4609a_b28fc387b1574337b6c13855a6495e8e.pdf
    • https://static.usrfiles.com/ugd/b8c837_32473a743d01447bb5e2ad934c3fa5c6.pdf
    • https://static.usrfiles.com/ugd/c63dba_835c5014640c44e7af2b85728662c774.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/86473036651.pdf
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/mifanotirapazemar.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/fe_mechanical_review_manual_download.pdf
    • https://static.usrfiles.com/ugd/de3d83_4e66c96905ca40c4a03ff12015826229.pdf
    • https://static.usrfiles.com/ugd/d55797_ce12f72bcee447d3adb0a5287aecc3cf.pdf
    • https://static.usrfiles.com/ugd/aef5b7_409d2b6559244c5ba80e359d4063a09c.pdf
    • https://static.usrfiles.com/ugd/49be48_f18bc5d3a8c0406fbeaf6b4a2c132e34.pdf
    • https://static.usrfiles.com/ugd/b8c837_d94c90fab25c4b93a51610943e2d2fdb.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_off0000582b.bin
8d61706a92029e893f8944d31e293d3a4db936312de5b26500300783e1a85df6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x582B 5204 bytes
font_01_sfnt_off000069ca.bin
f1ebde115f6103534465b67427361bf934e9036f25b53132b29bd5bd9490a7f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CA 10108 bytes

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