Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7993d5cd61a997a…

MALICIOUS

PDF

46.8 KB Created: 2020-08-31 15:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98c65ae8488cc9258a1ff58d7c770899 SHA-1: a638f2787861186c079d7ec51f82f9449011f35b SHA-256: d7993d5cd61a997aa97610009e7075c98c9e50e793f43f73e1a4d34f8ed48c5f
150 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, embedding numerous external URLs. One prominent URL, 'https://ttraff.cc/pify?keyword=chichester+university+music+performance', is flagged as a malicious redirector. The file's structure and the high number of outbound links suggest an attempt to manipulate search engine results or direct users to potentially harmful content. 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.cc/pify?keyword=chichester+university+music+performance
    • https://static.usrfiles.com/ugd/b8c837_2c3ccf94e199499b9bd50393b5a930bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f299848bf874082b870d2a04cb945b0.pdf
    • https://static.usrfiles.com/ugd/b47706_722c70fd357644beb392b76815e9b7a0.pdf
    • https://static.usrfiles.com/ugd/e2b09b_1f0beaae25ee4dc6979629cb114240a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_c76d37e2515a4a21b7f32e3888465f3a.pdf
    • https://static.usrfiles.com/ugd/a838c0_86ecf40061a8413393236eabdb2e28f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_9dc96796af0d4b2895c31bd864571d53.pdf
    • https://static.usrfiles.com/ugd/ff2e72_8c45ac11b64743e7896b32e140696ab2.pdf
    • https://static.usrfiles.com/ugd/c618e9_70b3b3de930443ed8741a96d03e89ae4.pdf
    • https://static.usrfiles.com/ugd/b8c837_e63ed30d3bb74fc4b721a7fc51224914.pdf
    • https://static.usrfiles.com/ugd/221f3a_a5bd27a754274323b69de36c9edb8acc.pdf
    • https://static.usrfiles.com/ugd/7c3584_5cf5425971fe4b778d7e716add4abb5e.pdf
    • https://cdn.shopify.com/s/files/1/0462/3902/3253/files/zugofajitoderuzarabawixi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0380/3808/files/convert_file_from_photoshop_to.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/jogesaleloreroruserazu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0963/6512/files/43553422697.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_off000079ad.bin
7d2ce9d314d43ac3060f8d3c03845d0293a0fbb6ea2e127f68a21738333ad4c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79AD 5288 bytes
font_01_sfnt_off00008b88.bin
c00a06485def52f8400fca68d7735229ed9c3ecdbd1704cf295df1cb5ac35b55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B88 10140 bytes

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