Malicious PDF — malware analysis report

Static analysis result for SHA-256 3782cae2b93f3e82…

MALICIOUS

PDF

44.6 KB Created: 2020-09-01 01:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60817bf1d82c8c87b3a67fe7a4b287d3 SHA-1: 825a53f94eb82810b7f7147b4c6c4ea2cbc1d6a7 SHA-256: 3782cae2b93f3e8298d06dfdf1d4f6f44943b9df9e54e0c94ca6e3037b4f181d
128 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users into downloading further malicious content. The document also contains a mass of external PDF links, likely for SEO poisoning, and a visual download button lure. The primary malicious URL is https://ttraff.cc/wix?keyword=simple+convertible+note+term+sheet, which is the most critical IOC.

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.cc/wix?keyword=simple+convertible+note+term+sheet
    • https://static.usrfiles.com/ugd/9a242c_7e2c06d62f944b66b08460d3d0cf6951.pdf
    • https://static.usrfiles.com/ugd/b8c837_fdc282079e82424ca25f13a1dc5378d9.pdf
    • https://static.usrfiles.com/ugd/1decf9_004907adb70a4651b7c8fc42a4b18717.pdf
    • https://static.usrfiles.com/ugd/b8c837_00fea06aa38c4ce8bc87f5a3bba3301c.pdf
    • https://static.usrfiles.com/ugd/0cd019_b1dc69cdfc43477a84cfaf5219c47d54.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/solemifekukofemutidutato.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1617/files/4116562788.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4172/files/77483619075.pdf
    • https://cdn.shopify.com/s/files/1/0449/7945/4111/files/bhagya_chakram_naa_songs.pdf
    • https://static.usrfiles.com/ugd/704566_a6746d2629d240cfae9237567c6cd22d.pdf
    • https://static.usrfiles.com/ugd/d162e3_31d2ea888a3f477590652d1e42773e84.pdf
    • https://static.usrfiles.com/ugd/b8c837_e69250fb03e14470902f1bd44a5e9f79.pdf
    • https://static.usrfiles.com/ugd/b8c837_67d1206d6adb4f778f1d49ffd79c9964.pdf
    • https://static.usrfiles.com/ugd/b8c837_41401a2f0eea43b1b83d15ee84866c36.pdf
    • https://static.usrfiles.com/ugd/3e9e83_2f111f98242c4c3fbeb773f0f915b260.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_8877e8d09ba54d9da385164124890dcd.pdf
    • https://static.usrfiles.com/ugd/29c71c_48eb5091332943068c63498d85e953be.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_off0000701b.bin
957786887fae061c038c78da3ff0986ba8f4642370e79c8b743cafd9b6c324bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x701B 5264 bytes
font_01_sfnt_off000081db.bin
46cba2c6f24aa95e5ed147bd0e78710f013ea112b490a029f8dcce1461471453
pdf-font-stream PDF embedded font (sfnt) at offset 0x81DB 10432 bytes