Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ac332075b8e4b7…

MALICIOUS

PDF

58.3 KB Created: 2020-08-28 23:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5407cff837c418a392d8ee056c11c41d SHA-1: 64d910f34571a9d336976ea55ff7e28b14e6aece SHA-256: f8ac332075b8e4b770f39b2115b0f2d6d1e151c3140f23a84ebe1fbb76f0c7f8
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with one heuristic specifically flagging it as a 'PDF SEO Link Farm'. The primary malicious URL, 'https://ttraff.cc/wix?keyword=pathfinder+cord+of+stubborn+resolve', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDF files, suggesting a coordinated effort to distribute links.

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.cc/wix?keyword=pathfinder+cord+of+stubborn+resolve
    • https://cdn.shopify.com/s/files/1/0435/3120/6808/files/jeduzonokisovibabun.pdf
    • https://cdn.shopify.com/s/files/1/0434/7189/6741/files/behavioural_activation_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0989/9670/files/hex_cable_gland_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0433/1307/0238/files/tevenewujodaxep.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb243ba64c664cde867e4be476f46504.pdf
    • https://static.usrfiles.com/ugd/b8c837_d68c6f48aa114e01934e7c0366e1c7f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2cdd7914f6664c0fb4f3b3874868d185.pdf
    • https://static.usrfiles.com/ugd/b8c837_81dc683b970c48aca77afce710b8cbcd.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ef64ecb730745fa80d6796dcadb740c.pdf
    • https://cdn.shopify.com/s/files/1/0438/2870/7485/files/stihl_015_av_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/9746/3714/files/92820083878.pdf
    • https://cdn.shopify.com/s/files/1/0434/7074/9849/files/antologa_de_cuentos_de_terror.pdf
    • https://cdn.shopify.com/s/files/1/0434/1157/0838/files/14983795690.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ab9fea6b2844dde98454f9542b0f382.pdf
    • https://static.usrfiles.com/ugd/b8c837_2baf3123d5914fa188f56659c9d14a21.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ac059802fc34f08872ac0a45fc587c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_9dedc56197484533b1324d7af58c9926.pdf
    • https://static.usrfiles.com/ugd/b8c837_778fabad083c45bcac7329df819bf7d4.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_off00009ecc.bin
c78b2244e14c8ec40b89ae0994b9bfb86b4596738afa31897e97828f70b3d9af
pdf-font-stream PDF embedded font (sfnt) at offset 0x9ECC 5312 bytes
font_01_sfnt_off0000b0c9.bin
4fab6679ba430bb9fff175b78cdee57158890c73cd8025519fb330f38e269070
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C9 13708 bytes