Malicious PDF — malware analysis report

Static analysis result for SHA-256 85a5764cc4e26573…

MALICIOUS

PDF

45.3 KB Created: 2020-09-08 03:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 668a9f476e60cc12644532a9803db801 SHA-1: ebcde192104d240fe4d2d857f810d0676f800390 SHA-256: 85a5764cc4e26573994bd16d2e7a71b7c23b05356d4b96996475651afc4f8dd3
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm or SEO manipulation tactic. The presence of the malicious redirector URL points towards an attempt to lead the user to harmful content. No scripts were extracted from this sample.

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=guidestones+elberton+ga
    • https://static.usrfiles.com/ugd/1df9ea_b08cb42f06f848249b516bb4148761c4.pdf
    • https://static.usrfiles.com/ugd/cc14e4_0141afab9082455286d97004b1f2df20.pdf
    • https://static.usrfiles.com/ugd/185811_eb34273e0d18459dbc25e8024f3cfc86.pdf
    • https://cdn.shopify.com/s/files/1/0439/5725/6350/files/3091695532.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/anticancer_drugs_classification.pdf
    • https://cdn.shopify.com/s/files/1/0431/7973/7237/files/middle_fork_flathead_river_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/2698/0765/files/ap_chemistry_acids_and_bases_test.pdf
    • https://cdn.shopify.com/s/files/1/0436/5362/8062/files/wivigeluvofoxajupaxetakan.pdf
    • https://cdn.shopify.com/s/files/1/0448/2105/3600/files/tell_me_about_yourself_interview_answer_example.pdf
    • https://static.usrfiles.com/ugd/ea2f88_bcdda737869549d6a6df756bcddfc94f.pdf
    • https://static.usrfiles.com/ugd/b85eb0_9132c1e91f9f41f687fa2bfb96073f4a.pdf
    • https://static.usrfiles.com/ugd/66f7a0_243d0ac3949344dea19c182c5134576f.pdf
    • https://static.usrfiles.com/ugd/63f22d_0086eb5a09ee42679c17c65938d4abee.pdf
    • https://static.usrfiles.com/ugd/98857b_e0a37cd00e384cad8c987485f544bc43.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_off00007412.bin
067116d895b3c022f1c706439169e35cf4a14e7619ddb096dda9534ad6ca4ce7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7412 5164 bytes
font_01_sfnt_off000085a6.bin
41cdfefa666d722b837650ff76532ed1fec46d612a34f52ce4df4a44d837dfff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85A6 10156 bytes

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