Malicious PDF — malware analysis report

Static analysis result for SHA-256 2932b1363e4e5120…

MALICIOUS

PDF

51.0 KB Created: 2020-09-01 07:40:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a096cb6f77d7825313ac45397344c33a SHA-1: 28ba9079e128957c6d5b453c035404259de23d64 SHA-256: 2932b1363e4e512085aa6842d2e50754bc31c98978a0ac85c622078957d22010
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.club'. This URL is likely used to funnel users to a phishing site or download further malware. The document also contains a mass external PDF link farm, with many links pointing to Shopify domains, but the primary malicious indicator is the redirector. No scripts were extracted from this sample.

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.club/wix?keyword=tor+browser+for+iphone+free
    • https://cdn.shopify.com/s/files/1/0436/8554/4089/files/college_biology_textbook_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3445/files/watch_madea_goes_to_jail_the_play.pdf
    • https://cdn.shopify.com/s/files/1/0460/3527/1844/files/cisco_anyconnect_4._6_windows.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3062/files/audix_adx51.pdf
    • https://cdn.shopify.com/s/files/1/0429/3158/5180/files/partnership_proposal_letter.pdf
    • https://static.usrfiles.com/ugd/6203b9_d12304cea21a4b0f87325dc88cf0404e.pdf
    • https://static.usrfiles.com/ugd/b8c837_a38d6fa4cb47484080ed3b800154c22e.pdf
    • https://static.usrfiles.com/ugd/314c35_77c33fbe5de7410ca26e74a62d87163c.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fe4806c12d940f59fa3b05f91102399.pdf
    • https://static.usrfiles.com/ugd/c618e9_7b972ffbd58f488cb61f893e649ea9d0.pdf
    • https://static.usrfiles.com/ugd/5438e3_350ae1c15beb4421957ac863a5d90276.pdf
    • https://static.usrfiles.com/ugd/80bfa9_b04fdad1d0b34cf48e7e6aed86808025.pdf
    • https://static.usrfiles.com/ugd/cac9e4_fc484d28fa3b4273b2c48f97c666e635.pdf
    • https://static.usrfiles.com/ugd/097bd5_eece80d23cb74f20bbb623d2332a9a6b.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bcc5f2c98884778aaea515996663cd5.pdf
    • https://cdn.shopify.com/s/files/1/0437/7195/3301/files/30117090037.pdf
    • https://cdn.shopify.com/s/files/1/0432/3360/7842/files/navodaya_vidyalaya_admission_form_2020.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_off000072bb.bin
36a3e61c3f0ba9377286af04f69b184a282cbc5936174babebe14f6a62c157f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x72BB 4928 bytes
font_01_sfnt_off0000838d.bin
c589e003c5847b6aadb5347925046e9067aed7d680c758892a8e5c1b41ecc890
pdf-font-stream PDF embedded font (sfnt) at offset 0x838D 10944 bytes
font_02_sfnt_off0000a91e.bin
30095330f1fb279a6cadd6ab26bead66360e702c81356f22f09185d24c247ad2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA91E 16324 bytes