Malicious PDF — malware analysis report

Static analysis result for SHA-256 351cf194b99dc323…

MALICIOUS

PDF

49.2 KB Created: 2020-08-30 04:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a49325ed195884449c33be796368703 SHA-1: 686318f0b94dc815b43caa2f4e8da35d71fb51b0 SHA-256: 351cf194b99dc323448b73ffe7be31b912e764970effb08b765c7048ca76999c
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 links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/wix?keyword=batman+the+dark+knight+returns+part', is flagged as a known malicious redirector. The document body appears to be heavily obfuscated or corrupted, but the presence of the link farm and the malicious redirector strongly suggest an intent to lure users to malicious sites, likely for phishing or malware delivery.

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=batman+the+dark+knight+returns+part
    • https://static.usrfiles.com/ugd/b8c837_394a5068d7e449e1b1c9c88527e82da4.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e0db41fab7a4f1fb25cba1e58049a61.pdf
    • https://static.usrfiles.com/ugd/b8c837_68d82d63751d4673a654b89ed94a7141.pdf
    • https://static.usrfiles.com/ugd/1a89c8_d0366bf94cf647168ba91afff6ce005c.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/sosuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2261/files/bromic_chest_freezer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/1030/7749/files/riviwi.pdf
    • https://cdn.shopify.com/s/files/1/0458/2421/3155/files/22056746739.pdf
    • https://cdn.shopify.com/s/files/1/0432/6277/1366/files/free_wedding_border_templates_for_word.pdf
    • https://cdn.shopify.com/s/files/1/0434/3595/0241/files/68997471028.pdf
    • https://cdn.shopify.com/s/files/1/0430/6852/2657/files/manual_de_abordagem_policial.pdf
    • https://cdn.shopify.com/s/files/1/0461/9878/4149/files/mafina.pdf
    • https://cdn.shopify.com/s/files/1/0428/2066/5510/files/applied_social_science_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/pukifotajozevevuvolalexo.pdf
    • https://cdn.shopify.com/s/files/1/0451/0243/2408/files/apple_support_email_fake.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_off0000749f.bin
e7f840422b3c50b0051fd522765be2eff3fb6fc599791be2782a1b5e3529e727
pdf-font-stream PDF embedded font (sfnt) at offset 0x749F 5224 bytes
font_01_sfnt_off00008629.bin
318364f024dbcc06900ce3c46e6c6d8add5a9773758f0157e4e98ebf46cf144a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8629 10448 bytes
font_02_sfnt_off0000a9dc.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA9DC 4324 bytes