PDF malware analysis — malicious · 400f4a319c718934

MALICIOUS

PDF

46.0 KB Created: 2020-08-31 14:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a64daa41ac7ba15a81c5d76c1a99b9bb SHA-1: e04dbe103004bfff119c71d3d9db8944480a4d88 SHA-256: 400f4a319c718934f12835aa198fbf975eaa73d21282ac61bc127c8713d5da00

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL 'https://ttraff.ru/wix?keyword=factual+report+text+example' is identified as a malicious redirector. Additionally, the document contains a large number of links pointing to 'static.usrfiles.com', suggesting a coordinated effort to distribute malicious 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.ru/wix?keyword=factual+report+text+example
- https://static.usrfiles.com/ugd/ec0c41_fcfc37834a28445a95b49a2d0662bdc4.pdf
- https://static.usrfiles.com/ugd/0cd3a8_bf2e02d460014c0cb00a74a450799a43.pdf
- https://static.usrfiles.com/ugd/314c35_f1c99741d90f48599388780ef8acc785.pdf
- https://static.usrfiles.com/ugd/b5aed9_cb6ad761c55b4faab0b4b553fc47622f.pdf
- https://static.usrfiles.com/ugd/b8c837_0d2c8329fb094d4db01d7011dc740726.pdf
- https://static.usrfiles.com/ugd/b65acf_bfb4cdf9e365448b956f3affd8f3fa6e.pdf
- https://static.usrfiles.com/ugd/3d0627_8490dc3c678f40b2803ea0a1ceeff246.pdf
- https://static.usrfiles.com/ugd/824332_e4288b3f7e99462f977c5c8fc5659a26.pdf
- https://static.usrfiles.com/ugd/599f1c_96fc53e49de1489ba92ce4c240aae2ba.pdf
- https://static.usrfiles.com/ugd/3d0627_c02d0042dc7948098733290a33729197.pdf
- https://cdn.shopify.com/s/files/1/0431/2668/5850/files/mina_ianovici_video.pdf
- https://cdn.shopify.com/s/files/1/0432/4874/6651/files/amazing_grace_gospel_chords.pdf
- https://cdn.shopify.com/s/files/1/0430/1350/5185/files/66905902427.pdf
- https://cdn.shopify.com/s/files/1/0433/7673/8462/files/kemavebe.pdf
- https://cdn.shopify.com/s/files/1/0434/6219/7400/files/used_vehicle_information_package_ontario.pdf
- https://cdn.shopify.com/s/files/1/0433/4452/7528/files/free_math_worksheets_for_grade_2_multiplication.pdf
- https://cdn.shopify.com/s/files/1/0464/5568/5288/files/fetal_echocardiography_report_format.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_off00007689.bin` `71a700b1a3c08bc895683484b88b8173238ed5101dae08cbc4f6b9bafbce4b47`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7689	4924 bytes
`font_01_sfnt_off00008737.bin` `0c96b69f856729cca290ee8d6a60a57150b656eb2045e6b015ad4264d50db7ab`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8737	10104 bytes

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