Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb75ab5ba318cd7…

MALICIOUS

PDF

42.9 KB Created: 2020-08-30 15:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acd446368821e7e9286676072ec2ad58 SHA-1: bf486853ffe67c235702d9dc69f320d1b1eec310 SHA-256: 7fb75ab5ba318cd7f4e8497ad2424aa96a10f25e65b08052d963cdb82648a3e6
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The primary malicious URL identified is https://ttraff.cc/wix?keyword=crystal+knight+porn. While no scripts were extracted, the structure and heuristics strongly indicate a phishing or malicious redirection attack vector.

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=crystal+knight+porn
    • https://cdn.shopify.com/s/files/1/0435/8209/5519/files/sai_nakshatra_malika_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5105/6295/files/discover_card_authorized_user_credit_report.pdf
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/venice_transport_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/6437/8022/files/94645124761.pdf
    • https://cdn.shopify.com/s/files/1/0435/2724/1887/files/pavozofemoxepezaxifo.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe4db59a38d34125ab614f0278647cb5.pdf
    • https://static.usrfiles.com/ugd/0d2908_fab7413a7ae64f94b6c7d566a73c87d8.pdf
    • https://cdn.shopify.com/s/files/1/0432/5241/6672/files/85923968614.pdf
    • https://cdn.shopify.com/s/files/1/0428/5395/7799/files/5810972770.pdf
    • https://cdn.shopify.com/s/files/1/0434/5239/9773/files/87389989461.pdf
    • https://static.usrfiles.com/ugd/b8c837_fcd7010f44864e0495c381b9c7c8127f.pdf
    • https://static.usrfiles.com/ugd/c068f8_4e436e8f21b048679bd0b0310d5e9c08.pdf
    • https://static.usrfiles.com/ugd/defcb2_79252aa870bc4c808fd2090dff2f235c.pdf
    • https://static.usrfiles.com/ugd/a1fb72_6efc879ef4154b889ecb6375afd8bce1.pdf
    • https://static.usrfiles.com/ugd/b8c837_c59f6c0eb37742cda4586de8e5ae4a8a.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_off00005e08.bin
0819e81d23b7757a6da452f025b0fcd88645a4a7b3c68034484945b84dd3aa83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E08 5152 bytes
font_01_sfnt_off00006f91.bin
64f35e8be1dd3507afeaecbe9b5b7ec9ed5ff6472420f124e9f2d195de27496d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F91 15452 bytes

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