Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c0964074742bb35…

MALICIOUS

PDF

60.9 KB Created: 2020-08-31 15:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca2b9f2ba81334c509b316d8159e83ce SHA-1: 1c571fc086ef3b5c1196f8949d03080734886e7d SHA-256: 9c0964074742bb3597e0d4ffdd5a2a66d98d4554bb25834dbd9e673a7b033d13
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on static.usrfiles.com. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be intended to trick users into believing they need a password for an archive, a common tactic to bypass gateway security. The primary malicious IOC is the redirector URL.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=mere+bhole+bhandari+song++pagalworld
    • https://static.usrfiles.com/ugd/19ce5d_1a67ae6458d64fbfb3c6b408910fa6cf.pdf
    • https://static.usrfiles.com/ugd/affb4a_5a0ec52e18fb496ea4536893bb7efbd8.pdf
    • https://static.usrfiles.com/ugd/6f7357_2d28aad58ca94db4971792edb0d1f3b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_8432177643f44956bbf81b136dba065b.pdf
    • https://cdn.shopify.com/s/files/1/0428/9226/3583/files/astral_chronicles_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/dijizodupetebo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7644/2519/files/lifugekapamagogezo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/38556325106.pdf
    • https://cdn.shopify.com/s/files/1/0440/6879/8614/files/48164322081.pdf
    • https://static.usrfiles.com/ugd/b8c837_52090792789c447db2ed2b25b9c8073f.pdf
    • https://static.usrfiles.com/ugd/49be48_7eaf144465e649d98590890accd8162a.pdf
    • https://static.usrfiles.com/ugd/3b47cb_9f52f4d94ba9409c9bd49d29201cdb52.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/bollywood_5._1_mkv_video.pdf
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/73876326727.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009555.bin
386858f945fd7c6143efe90827f8c6bc1b02b11bb3eb5d525a89cb620025c55f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9555 5460 bytes
font_01_sfnt_off0000a7f3.bin
c4ad190d1dd91335c357e851e4394455960833a894c9acfa4859af584a2f3524
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7F3 15492 bytes
font_02_sfnt_off0000d867.bin
6913f29484e829b19209aba7b7650ec19d2c5f97ce7233b36c4452c891d39b95
pdf-font-stream PDF embedded font (sfnt) at offset 0xD867 3704 bytes