PDF malware analysis — malicious · a75f789e6f544376

MALICIOUS

PDF

53.6 KB Created: 2020-08-31 07:38:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 33652c36c44e7c15d27f1e7f3983f142 SHA-1: c0da1ae79ea6e4630aa4e743b198967158612228 SHA-256: a75f789e6f5443767df96f31a476a4e9eaffdada58df9b61303cf8988474942b

152 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains a malicious link that redirects to a known malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text fragments and the malicious URL, suggesting a lure to a malicious site. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a link farm, likely for SEO poisoning or to distribute malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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.cc/wix?keyword=the+isle+of+mists+witcher+3
- https://cdn.shopify.com/s/files/1/0449/3164/5608/files/b_boying_video_in_mp4.pdf
- https://cdn.shopify.com/s/files/1/0437/1628/0475/files/paxoven.pdf
- https://cdn.shopify.com/s/files/1/0430/8343/2096/files/jumaxepunofokugezovuzu.pdf
- https://static.usrfiles.com/ugd/affaa6_613eee684c224dad80ab2a48521a5a5d.pdf
- https://static.usrfiles.com/ugd/4dd980_a4828cd8ca6b4c818384ffdaf7d6eea4.pdf
- https://static.usrfiles.com/ugd/b8c837_bf703661b1b440a5b9a3181c2ce5b30c.pdf
- https://cdn.shopify.com/s/files/1/0433/1523/2921/files/48205084049.pdf
- https://cdn.shopify.com/s/files/1/0428/8885/5718/files/39517791486.pdf
- https://cdn.shopify.com/s/files/1/0433/7781/9802/files/cissp_8_domains_summary.pdf
- https://cdn.shopify.com/s/files/1/0430/8674/1655/files/5236674034.pdf
- https://cdn.shopify.com/s/files/1/0431/4189/0208/files/gidemesikixoserukuga.pdf
- https://cdn.shopify.com/s/files/1/0429/9417/2058/files/balanitis_tratamiento.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_off00009526.bin` `0a955cada734daa1b21efb36e54c56a7445a79bbb8e97cd2a55f93c3395e8dda`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9526	5116 bytes
`font_01_sfnt_off0000a67d.bin` `fbaad0dff674c8de1ed99b26783115188071feea033a79bc24023ffefdb50711`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA67D	10404 bytes

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