PDF malware analysis — malicious · e2e86574eb4e6943

MALICIOUS

PDF

37.3 KB Created: 2020-08-30 12:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9dabbced70f7680c6c9b21e528c0ab28 SHA-1: 65e7bafcea57bc21dfb51b4639f938551e508c11 SHA-256: e2e86574eb4e6943181dd17d5006e4d0d7bcd91ab00d81ad969dda2a521765df

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This indicates a likely attempt to direct users to a malicious site, potentially for phishing or malware delivery. The ML classifier also strongly flagged this PDF as malicious.

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.ru/wix?keyword=springtree+apartments+eugene
- https://static.usrfiles.com/ugd/33c377_e44be7d164174dd3b115d3046de64877.pdf
- https://static.usrfiles.com/ugd/b8c837_1ec9cfcc516241eb91aaee5f9f0ea4fd.pdf
- https://static.usrfiles.com/ugd/7c3584_b10225c04b7242c595f94d731ead00c0.pdf
- https://static.usrfiles.com/ugd/b8c837_af8efbe698fa4e498c6bdc545e84aa6e.pdf
- https://static.usrfiles.com/ugd/b8c837_3a4ea0cd60014030b103700e0c3e7d7e.pdf
- https://static.usrfiles.com/ugd/a6e5e9_28b653bc690943778ad13bed59f5ccca.pdf
- https://static.usrfiles.com/ugd/b8c837_14a25d68ba944863b75be45b38f4838e.pdf
- https://static.usrfiles.com/ugd/f55bec_a6d9c70e275d47cc954e7a872bd779d4.pdf
- https://static.usrfiles.com/ugd/b8c837_96ca8690fda74c27bbbcaf388d325fc6.pdf
- https://static.usrfiles.com/ugd/95089d_0b759bcd479f4845a40b2fc2962db6e9.pdf
- https://cdn.shopify.com/s/files/1/0432/5608/6696/files/nitiledo.pdf
- https://cdn.shopify.com/s/files/1/0430/9227/9460/files/biblia_ortodoxa.pdf
- https://cdn.shopify.com/s/files/1/0431/0577/9878/files/javascript_blob_set_filename.pdf
- https://cdn.shopify.com/s/files/1/0464/6495/8616/files/va_cash_out_refinance_loan_disclosure_form.pdf
- https://cdn.shopify.com/s/files/1/0428/4134/2108/files/70020201732.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00004b36.bin` `f8943cfd94fa7616a315964567d633dc89302847b641e857a7db96484cd94053`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4B36	5212 bytes
`font_01_sfnt_off00005cd8.bin` `c34a84187d5290dc342eaac15f5146bf176ce1ed42b167afa15052e942ee9749`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5CD8	13812 bytes

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