Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e67251a57a52c3b…

MALICIOUS

PDF

43.0 KB Created: 2020-09-01 20:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73ec4e31c917de7298f37c400f7e64c6 SHA-1: 678b063336a14e643856d0bae7ac3df259ecef97 SHA-256: 8e67251a57a52c3b5edd7bcf738546e4a2880d58148667ee0b23edc85042d158
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link and a large number of external PDF links, indicative of a link farm or SEO poisoning tactic. The presence of a visual download button lure further supports the malicious intent. The primary malicious URL identified is https://ttraff.me/wix?keyword=kindle+file+format+convert+pdf, which likely leads to further malicious content or phishing pages.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=kindle+file+format+convert+pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0979/files/72397171300.pdf
    • https://cdn.shopify.com/s/files/1/0436/9960/1576/files/86540214746.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0122/files/hematology_drive.pdf
    • https://static.usrfiles.com/ugd/d43733_9da81d761ae64dad8c19acecd0152579.pdf
    • https://static.usrfiles.com/ugd/b8c837_d762bab8e367463a80d8b9eff268446d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a70e80a52f3a4c23bb7641c38ced28af.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f4143c3fc0849e3a9f8ae1afe812a87.pdf
    • https://static.usrfiles.com/ugd/cfa91a_5fd0644ba21f4ab3a5cf36c86494c645.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_bced3bc7825e476fa172939727968103.pdf
    • https://static.usrfiles.com/ugd/45fd81_53257ab72e8a43abb5b453356f1b6ec2.pdf
    • https://static.usrfiles.com/ugd/b8c837_666dccc875de4a9b890f7e5c2c0f4a59.pdf
    • https://static.usrfiles.com/ugd/01e791_ccbb1d1654724a94addc8190cc167c3b.pdf
    • https://static.usrfiles.com/ugd/e42ee3_38495de3eee547cd8fa7c25f1e8ef8d1.pdf
    • https://static.usrfiles.com/ugd/0789d5_39112060040a4169a29be9f4d0a7532b.pdf
    • https://static.usrfiles.com/ugd/b8c837_2769f8438b554bbfa0dcfb48b0edcc55.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3eed76385524d2680b120440fff8d88.pdf
    • https://static.usrfiles.com/ugd/32777b_65cba6ad90674ef6b7b5554790c309b4.pdf
    • https://static.usrfiles.com/ugd/69695d_930e0d64ca0b4ced8f08eeea43761c1d.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_off000069b2.bin
577e274b7ba6f2ab7143457b6299d60c43e9f927294ea471c38d4f4318714b15
pdf-font-stream PDF embedded font (sfnt) at offset 0x69B2 5152 bytes
font_01_sfnt_off00007b2f.bin
57cbb99d958862c79707dd2fa76cff378cdf0d529774d60c7b084d9b46cfa237
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2F 10476 bytes