Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb5e8b5265d7276…

MALICIOUS

PDF

49.6 KB Created: 2020-09-03 02:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f44244ad8b8ea4db41f27c821172e67 SHA-1: a065a7302c763c9a1bee453b03ed7448af861c5d SHA-256: feb5e8b5265d72765e68898b7830bf1086a40fda40e68c7178c28915953ebae8
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a browser extension or viewer installation lure, a common social-engineering tactic. The presence of a link farm further suggests malicious intent, likely to drive traffic to malicious infrastructure.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=autodesk+inventor+viewer+2016
    • https://static.usrfiles.com/ugd/834936_190d74d5725a4c3a8e023fb821ab2acc.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_aab35e0cdc0f4ec996b7de9b6a7c9cda.pdf
    • https://static.usrfiles.com/ugd/d13e1f_f6e21a2efe3847e39cb3a8205c1ecb9b.pdf
    • https://static.usrfiles.com/ugd/61f964_5637e36a7dc94415b00cf094f078687d.pdf
    • https://static.usrfiles.com/ugd/ee6770_1500f57212b34b3488564a429524f6be.pdf
    • https://static.usrfiles.com/ugd/3e5d97_1de1727886954ede835311e2d8cfd3ff.pdf
    • https://static.usrfiles.com/ugd/913720_d1490a6911334e6395ef8fee88ffd4c8.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/mijuxiji.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/fitted_sheet_set_queen.pdf
    • https://cdn.shopify.com/s/files/1/0436/1574/8253/files/94464793019.pdf
    • https://cdn.shopify.com/s/files/1/0461/8587/3561/files/nitiweda.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/tewowizawip.pdf
    • https://cdn.shopify.com/s/files/1/0429/1349/7247/files/ncert_chemistry_textbook_for_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/449703497.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_off000062b9.bin
45f833593312f31857817b0418903add1574cec2eff283edf0c908a0ab772df1
pdf-font-stream PDF embedded font (sfnt) at offset 0x62B9 5588 bytes
font_01_sfnt_off00007642.bin
d40d03c8783222ed5f6eec1a5231dc264b3a877c5a10a96aa80da8a26e1a12d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7642 5264 bytes
font_02_sfnt_off00008860.bin
548f9260a5edf400bfeff08f8eb77899ad46a9de1ab387d59ab4bcc12d0b8cb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8860 15928 bytes