PDF malware analysis — malicious · 9074b4f3ed682154

MALICIOUS

PDF

42.7 KB Created: 2020-09-01 15:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 5a9a23c8b656d4b5c78b63289e353850 SHA-1: 9807d0c8e2df7d6d037e273924d6786b4710cdce SHA-256: 9074b4f3ed6821548fdbbe99cd2971733f3be97f2c564e93b5c2211f56652da7

120 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains a large number of embedded links, many pointing to external PDF files hosted on various domains, a technique often used for SEO poisoning or to obscure malicious redirects. One critical heuristic identified a direct link to a known malicious redirector at 'https://ttraff.ru/wix?keyword=elmswell+primary+school+ofsted+report'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

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=elmswell+primary+school+ofsted+report
- https://cdn.shopify.com/s/files/1/0437/8243/9063/files/53143440639.pdf
- https://cdn.shopify.com/s/files/1/0437/9607/0549/files/885503.pdf
- https://cdn.shopify.com/s/files/1/0431/6640/0663/files/20628949555.pdf
- https://static.usrfiles.com/ugd/234f58_050f1b1110214ea2add884af6dca90bf.pdf
- https://static.usrfiles.com/ugd/eda9ba_8006a807b78c418997f606637f00abe6.pdf
- https://static.usrfiles.com/ugd/4b7290_c2a3ba6dcd154f9ea9d441315a75aa0e.pdf
- https://static.usrfiles.com/ugd/b8c837_ba71dd6e8f044673ba316126623d5139.pdf
- https://static.usrfiles.com/ugd/b8c837_1afed4af97774fb89ac2cd30adfd8427.pdf
- https://static.usrfiles.com/ugd/47b1e8_2e2174bb82494724a77020c0b39258d5.pdf
- https://static.usrfiles.com/ugd/db93e9_6b0ceffd056947cba8a00b1de77e28f6.pdf
- https://static.usrfiles.com/ugd/b8c837_6a08c401915e4bd18991ef63afac1668.pdf
- https://static.usrfiles.com/ugd/b8c837_2803fc05dab84343b08fa42b98065201.pdf
- https://static.usrfiles.com/ugd/738632_64973c16912141a6882cf1f3dabe84f3.pdf
- https://static.usrfiles.com/ugd/704566_35cd692b7d714bfbb3ca6d69aa7c28cc.pdf
- https://static.usrfiles.com/ugd/b8c837_2c5c661847a24ede85af15664830ebeb.pdf
- https://static.usrfiles.com/ugd/7198c1_ed38b23a1c374ded95fd3d665976dba8.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_off00006840.bin` `2223983ef2006adca3012ac73eb357edcc883c3fde82b03707244b65d0d48342`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6840	5548 bytes
`font_01_sfnt_off00007b09.bin` `0c50ae10c23f15e1eecbefa59bd5334f4bf74f54afd4e79db49e0c1e5f5b7ca2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B09	10244 bytes

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