PDF malware analysis — malicious · b69f4681ef6281f4

MALICIOUS

PDF

47.1 KB Created: 2020-08-09 11:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 99816760076c367e52798ea6a385a210 SHA-1: 2532293b4483154fed08f337eeeb56c76c460d55 SHA-256: b69f4681ef6281f4bdf5f4c6367d76b823749461b30f6e606ae72ab3c80daebe

150 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 of which point to a link farm hosted on Shopify. One of the primary links, https://ttraff.ru/pify?keyword=ansys+workbench+contact+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Ansys workbench contact pdf', suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=ansys+workbench+contact+pdf
- http://files.khunterart.com/uploads/1/3/1/3/131383434/5775590.pdf
- http://paxaxar.kanturkbns.com/uploads/1/3/1/4/131408024/75cfddbe0a2ca3.pdf
- http://files.dubiousalliance.com/uploads/1/3/1/4/131454549/64b4ec07a9.pdf
- http://xekeguju.longbeachjunkremoval.org/uploads/1/3/0/9/130969204/8c000f7.pdf
- https://cdn.shopify.com/s/files/1/0428/4815/7859/files/lstm_in_keras.pdf
- https://cdn.shopify.com/s/files/1/0437/6304/0413/files/biodata_sample_bangla.pdf
- https://cdn.shopify.com/s/files/1/0431/3058/5239/files/zuriregitabawos.pdf
- https://cdn.shopify.com/s/files/1/0434/1858/3192/files/39596735651.pdf
- https://cdn.shopify.com/s/files/1/0430/7196/3296/files/monewezobalifopipajev.pdf
- https://cdn.shopify.com/s/files/1/0432/3947/3314/files/7013694597.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97072231683.pdf
- https://cdn.shopify.com/s/files/1/0429/2214/8003/files/74860617502.pdf
- https://cdn.shopify.com/s/files/1/0440/7263/2470/files/aashto_mechanistic_empirical_pavement_design_guide.pdf
- https://cdn.shopify.com/s/files/1/0430/3591/8489/files/gulozixuvogorasemo.pdf
- https://cdn.shopify.com/s/files/1/0428/6709/7756/files/11766255851.pdf
- https://cdn.shopify.com/s/files/1/0434/9958/5696/files/nfl_playoffs_2020.pdf
- https://cdn.shopify.com/s/files/1/0437/3974/2359/files/1122750491.pdf
- https://cdn.shopify.com/s/files/1/0432/8921/5129/files/favagupi.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_off000078f3.bin` `15b0cd8b612d5556523e21d2eac8ace1f27aaa68b2053039a6b955dd4fdb87ff`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x78F3	5600 bytes
`font_01_sfnt_off00008c14.bin` `f66fe23a751e1a57798d232576079a6574cee96758e5bca70b2bf245724ea946`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C14	10352 bytes

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