Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b1a51ea33c2eb8…

MALICIOUS

PDF

72.0 KB Created: 2020-09-11 18:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b3d70145bad86b072b0a22c52643cce SHA-1: 2dc4e97217d4529904bf2cc5e8a638a3c37aa4a6 SHA-256: 38b1a51ea33c2eb8c612affc8f1089534745d8666d780ef0bb2618a7d0c6bbc9
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, directing users to a URL that appears to be part of a link farm. The document body, though heavily obfuscated, contains text related to 'febrile neutropenia guidelines' and the authoring application 'wkhtmltopdf', suggesting a lure. 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.link/wix?keyword=febrile+neutropenia+guidelines+in+children%252B+ppt
    • http://piwetipu.rightseed.com/uploads/1/3/1/4/131483254/surabasikapixur.pdf
    • http://files.mosssnowsticksouthpacific.com/uploads/1/3/0/8/130813855/mikimewumipi.pdf
    • http://gazol.conniecycling.com/uploads/1/3/1/4/131454950/direwokog_zemajipo_gewilazedi.pdf
    • http://files.holisticlifeabundance.com/uploads/1/3/1/8/131856392/566506fc3faefbb.pdf
    • https://static.usrfiles.com/ugd/ac51ce_4963073604a849449f14773fab687b66.pdf
    • https://static.usrfiles.com/ugd/10e3af_5f8059b11f3548a9b7d6ed25e9e0965c.pdf
    • https://static.usrfiles.com/ugd/1a1092_d50f42cee23b48aa86bb9432c10519bc.pdf
    • https://static.usrfiles.com/ugd/5ad03d_b876d664a73a48b9b04e5a7cac9180cc.pdf
    • https://static.usrfiles.com/ugd/9058e5_910591474e0644ff8197e227e9ca9cfc.pdf
    • https://static.usrfiles.com/ugd/7a13df_f96441fa4ff745a9baccdc43b8486f6b.pdf
    • https://static.usrfiles.com/ugd/6f53d7_c53c90509ade4f14aa6ac58ddf775d3b.pdf
    • https://static.usrfiles.com/ugd/e2c223_cdbbd5c440d2458d943c0acfbf557660.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7913/files/togikojojolitogulubate.pdf
    • https://cdn.shopify.com/s/files/1/0428/9524/5475/files/26071447163.pdf
    • https://cdn.shopify.com/s/files/1/0441/2217/7688/files/pumpkin_carving_templates_haunted_house.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/ed_sheeran_supermarket_flowers_piano_sheet_music.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_off0000c7a8.bin
cb2bf467ef3cceb67f483b54a92440a84ce88ba2d2d36493eb0bdbe9c7406dc1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A8 1984 bytes
font_01_sfnt_off0000d11c.bin
d4be1bb0ad456376910174557998510be2ab062266c0fc37e1cb0605637bbdef
pdf-font-stream PDF embedded font (sfnt) at offset 0xD11C 5432 bytes
font_02_sfnt_off0000e381.bin
57259e6876097878c577c227eda8a3dda0b1f192e8eaec3603cffe19434751ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xE381 15120 bytes