PDF malware analysis — malicious · c51549d91981537e

MALICIOUS

PDF

46.4 KB Created: 2020-09-03 03:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 741193c6cfb318e71f6a876276003f05 SHA-1: 4a435406479945be1e1a9a28f0e009364cc39287 SHA-256: c51549d91981537e27dbcfbd79dfee9563c187724763fd359b2932e9a4cdcae3

128 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. Additionally, it exhibits a PDF link farm heuristic, suggesting a tactic to artificially inflate search engine rankings or distribute malicious links. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the combination of heuristics and the embedded malicious URL strongly indicates a phishing or redirection attempt.

Heuristics 4

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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.link/wix?keyword=basics+of+electrical+engineering+mcq+pdf
- https://cdn.shopify.com/s/files/1/0437/6900/4190/files/pakaxuvozesajoso.pdf
- https://cdn.shopify.com/s/files/1/0428/7312/7079/files/bisomoxukaxupesig.pdf
- https://cdn.shopify.com/s/files/1/0431/7279/0421/files/11194022242.pdf
- https://cdn.shopify.com/s/files/1/0428/8380/9439/files/jibakakozuwolaxifa.pdf
- https://cdn.shopify.com/s/files/1/0429/6281/3084/files/wunedetulivinoxodug.pdf
- https://static.usrfiles.com/ugd/a86d68_211b329af06b4907bf78d7f44522d8a2.pdf
- https://static.usrfiles.com/ugd/d7d6cd_dfbf4062cc93422ea03b0d8c231255e5.pdf
- https://static.usrfiles.com/ugd/54fa57_6a7c00824ff548869279ba31f06cfbe0.pdf
- https://cdn.shopify.com/s/files/1/0440/9946/9464/files/libafeja.pdf
- https://cdn.shopify.com/s/files/1/0431/9114/0501/files/87604688363.pdf
- https://cdn.shopify.com/s/files/1/0429/8555/4073/files/78732170843.pdf
- https://cdn.shopify.com/s/files/1/0430/6518/0314/files/adding_and_subtracting_fractions_worksheet.pdf
- https://cdn.shopify.com/s/files/1/0431/4418/3974/files/47046172746.pdf
- https://cdn.shopify.com/s/files/1/0429/9279/5801/files/87017322749.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_off000067c4.bin` `8e07dffdca4a7b39be065f1f06cdc9efaf89ec51f908ec2773d126c542f68435`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67C4	5648 bytes
`font_01_sfnt_off00007add.bin` `b0ec3bdfeb4c24ac5b1d560bfea6973388d3b8eaec39a4d9751940bd15e1b062`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7ADD	16224 bytes

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