Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b89f5721fdc8e9…

MALICIOUS

PDF

53.9 KB Created: 2020-08-30 03:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9192cd0759c14dd14620aed3f165822d SHA-1: 9f6ea9ca78a10591b54d24f5cb9d6ddacfc05883 SHA-256: a0b89f5721fdc8e908629e0ff315df7a8c60917d0a9b023f96d6117e693c64e5
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'disc personality test questions pdf', which is directly linked to the malicious URL. This indicates the document's primary purpose is to redirect users to malicious infrastructure.

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=disc+personality+test+questions+pdf
    • https://cdn.shopify.com/s/files/1/0432/8715/0752/files/pulsar_ns_160_spare_parts_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0433/5907/6510/files/65068222475.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/healthy_blood_pressure_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0437/4721/3464/files/48939552829.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/zureruvapokaxuwowemog.pdf
    • https://static.usrfiles.com/ugd/b8c837_15c531199c8e43b4894682af5ee4000d.pdf
    • https://static.usrfiles.com/ugd/ed64d2_7cf20b2588154be3983258e970cd5ee3.pdf
    • https://static.usrfiles.com/ugd/b8c837_06e809e4fc31494ea0b6ed5c3044aae4.pdf
    • https://static.usrfiles.com/ugd/253000_13c1fb94a1914145b0476b3bf85a6e44.pdf
    • https://static.usrfiles.com/ugd/b8c837_adca05bc47114b2da67169625e1603c1.pdf
    • https://static.usrfiles.com/ugd/0049ca_0cc445d69c9c4889afe01734fff4d379.pdf
    • https://static.usrfiles.com/ugd/b8c837_ddc0d5fcb8a44494abef368e060e3a4e.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_51fd5f11813646d7a8d1dfb16f6e3d9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_42246c1f7e694986bcaaca0ab1f366a2.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/79415970004.pdf
    • https://cdn.shopify.com/s/files/1/0431/0407/5933/files/oregon_harvester_application_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/sixigijixifebulifan.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_off000093af.bin
4674e62121ac93d5eec6173146dbb1e094a17813fb39d64fa7e6fac7f81630ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93AF 5376 bytes
font_01_sfnt_off0000a609.bin
a055949559de5ce109fb6474cad72e7ed226cba9ffaf47f5b7e9f1fe7e972a8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA609 11004 bytes

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