Malicious PDF — malware analysis report

Static analysis result for SHA-256 e411c9f422ad4853…

MALICIOUS

PDF

117.3 KB Created: 2020-08-31 08:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 568cea7f66f1f59d49cf9207275efd02 SHA-1: 03d90b6cf106f3e2e621fc7b4bd53e1bf6c6576b SHA-256: e411c9f422ad4853eb2031682ce375078b8a2b0e1760fe282d66e511e3d7a656
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a game guide and the malicious URL, suggesting a lure to trick users into clicking the link. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.ru/wix?keyword=out+of+the+abyss+level+guide
    • https://static.usrfiles.com/ugd/e7e4a0_b8803e8962c74fb088dea591d45bfd6f.pdf
    • https://static.usrfiles.com/ugd/e32576_d9d5a3b0a7d948a1a590e9d886588747.pdf
    • https://static.usrfiles.com/ugd/0aab01_83d4f31e7bcc4f859f79a2f51395af20.pdf
    • https://static.usrfiles.com/ugd/a76634_ef335c9987cc412ea811842d77d74f80.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_4618d431cda24466847229afa5a82e2e.pdf
    • https://static.usrfiles.com/ugd/36f25b_b7d42dcefc114ad08da2df26d562d3f5.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_554b1729d7f640e99a0ec58e5f464bdb.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cc9a21817e24df2867177d881349732.pdf
    • https://static.usrfiles.com/ugd/87fdc7_c2dd8ed49d6f4c33b39e6dbbc20bf377.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_1d8c8e404efa4ece8b4ecbaa29d5c24d.pdf
    • https://static.usrfiles.com/ugd/fd30ac_79683053e44145e487522a2071f68da9.pdf
    • https://static.usrfiles.com/ugd/b8c837_182db166c3ec49599cd72e90960aaf03.pdf
    • https://static.usrfiles.com/ugd/a59130_9ba4b7932b3f4e569982a6a3e7b46233.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_off000190fa.bin
f342427596f69059e690b064aff377fd799f171a08f089171e117edfff0d6a18
pdf-font-stream PDF embedded font (sfnt) at offset 0x190FA 5404 bytes
font_01_sfnt_off0001a360.bin
396ecbcefb437e733d6a0d019e5cc21e9cb19730e7142482240e92caeba7b814
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A360 10800 bytes