Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec0bf4af5377d917…

MALICIOUS

PDF

34.4 KB Created: 2020-08-31 06:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac091f67f1ff9d2c0f447e4b9886af0a SHA-1: 977d8e3adadac3767d36325ef49b61105552eef9 SHA-256: ec0bf4af5377d917a618729a111b1332467a69a4b8cd20ace242174666fa07c5
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a 'Frisky business trophy guide'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the embedded URL, https://ttraff.cc/wix?keyword=frisky+business+trophy+guide, leads to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic suggests a large number of outbound links, with the first being to a Shopify domain, indicating a potential link farm for SEO manipulation or further redirection. No scripts were extracted, but the presence of these indicators strongly suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=frisky+business+trophy+guide
    • https://cdn.shopify.com/s/files/1/0435/4228/2399/files/33315716521.pdf
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/rimipuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/5283/3695/files/child_apperception_test_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/8593/7307/files/5436157882.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6773/files/pidabuwani.pdf
    • https://static.usrfiles.com/ugd/3aee12_8dfc3b8e55624833ada2a3fb00f5b431.pdf
    • https://static.usrfiles.com/ugd/cfa91a_5518fb446d2649babceef7559c2cbd20.pdf
    • https://static.usrfiles.com/ugd/9c43ec_dfd8a853ed94495abb21f3fe26a2c10f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a59f48b8c4b24d6183b9e1acc0a0680b.pdf
    • https://static.usrfiles.com/ugd/b972d5_e06fb498ae7c4bfb9fd3f5aa4693bf64.pdf
    • https://static.usrfiles.com/ugd/9421c8_dd5df136beb4464cb840d444e24da374.pdf
    • https://static.usrfiles.com/ugd/b7306e_62f5ef76aeaa488a806544c311b934ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d6deec0ed734868ab6adadb3c7a2167.pdf
    • https://cdn.shopify.com/s/files/1/0437/7359/1703/files/55586640155.pdf
    • https://cdn.shopify.com/s/files/1/0431/5571/8298/files/merebusu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/90661631214.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_off0000488c.bin
bcadc4dfb61cb9f0fb29990c43a7e14e5bc70f3610124aa36d5cbc67d2e8e038
pdf-font-stream PDF embedded font (sfnt) at offset 0x488C 5240 bytes
font_01_sfnt_off00005a59.bin
67390006491e2c2d67a200e9b77dfa14b15f2eaec54469b8de9f03cf634e8e5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A59 10096 bytes