Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d18bd13e44d5209…

MALICIOUS

PDF

44.3 KB Created: 2020-08-09 22:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0723f59aa8724c18afa28ec64233d9d SHA-1: 0af14179e67e7702d21ca7b1d99371f08da834c8 SHA-256: 3d18bd13e44d5209bd36722a2e114bab68a84ba6cc7de537b1e53b0907724ebc
160 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.ru'. The 'SE_CLICKFIX' heuristic indicates the document likely attempts to trick the user into executing a command, further supporting a social engineering attack. The presence of a malicious redirector URL is the primary indicator of malicious intent.

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/pify?keyword=basics+of+computer+networking+in+pdf
    • http://vutasu.asbestosmasters.com/uploads/1/3/1/4/131407705/bedozeguxopabija.pdf
    • http://files.sassycrav.com/uploads/1/3/2/3/132302951/nilonomasapolelumabo.pdf
    • http://files.bravoballoon.com/uploads/1/3/2/7/132740541/zefuvazuwikux.pdf
    • https://cdn.shopify.com/s/files/1/0440/1784/4382/files/wajun.pdf
    • https://cdn.shopify.com/s/files/1/0432/0002/0635/files/97477725365.pdf
    • https://cdn.shopify.com/s/files/1/0434/7897/4616/files/fobitunimuzi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/ramusanuzidetovumevinone.pdf
    • https://cdn.shopify.com/s/files/1/0435/1796/8543/files/10cc_dreadlock_holiday.pdf
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/54292980482.pdf
    • https://cdn.shopify.com/s/files/1/0430/4325/8522/files/68692906617.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/kugenefasirag.pdf
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/bepazowal.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7696/files/25170298580.pdf
    • https://cdn.shopify.com/s/files/1/0431/5778/2690/files/js_decode_base64.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/makuboxizipirifabe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6681/files/24554019570.pdf
    • https://cdn.shopify.com/s/files/1/0438/0337/7824/files/operatoria_dental_barrancos_5ta_edicion_descargar_gratis.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_off00006d7f.bin
cda300869d908d556b7bc1f796dd4d0fb03e8893ab37cd35d20ffade91113195
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7F 5648 bytes
font_01_sfnt_off000080bb.bin
ede4d8a330a1dbd2e627cbc285d9a2762cf348de335e4922b13f931b06ccd952
pdf-font-stream PDF embedded font (sfnt) at offset 0x80BB 10248 bytes