PDF malware analysis — malicious · bcbff95bf04c9637

MALICIOUS

PDF

136.4 KB Created: 2020-09-09 13:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0e6ac9f08f173f6feb2dc6f983ad412f SHA-1: 2df1df72c6e7259215cfcbf616815ef3a257d31c SHA-256: bcbff95bf04c9637ec8f562e3dcbc50eab42c0a3db6d6ca379f9d1b8f9e76e91

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of a large number of external PDF links also suggests a link farm or SEO manipulation tactic 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.com/wix?keyword=aging+process+pdf
- https://static.usrfiles.com/ugd/a474dd_655e1a3bdb7c4682b3eef88f2efbce1b.pdf
- https://static.usrfiles.com/ugd/2eec94_9767530cbc8548ecbba65e8c38c18599.pdf
- https://static.usrfiles.com/ugd/aaaf79_aa363086516f4fcd8122aa0ffddea069.pdf
- https://static.usrfiles.com/ugd/299074_b0efbd4da27541ada1a024fb7110713f.pdf
- https://static.usrfiles.com/ugd/debbe1_f3b04bb607f740f696e5e94a4067618e.pdf
- https://static.usrfiles.com/ugd/9b7d8a_76780eb3fe8c4fcabfac7372d9e3810a.pdf
- https://static.usrfiles.com/ugd/98d33d_93d0ddaea6dd4257ae4fa5788226ffe8.pdf
- https://static.usrfiles.com/ugd/18f527_7f1defd8a2fc4b8f956fedb9a2fc115a.pdf
- https://static.usrfiles.com/ugd/cbe7f7_6f1e948ffa2d48ad9fc21452ec042c5b.pdf
- https://static.usrfiles.com/ugd/e33828_615ec2642d3c43f8a4cf840590b63e7c.pdf
- https://static.usrfiles.com/ugd/ade4e6_b46dcce45e474afbbb09343d3c4cd432.pdf
- https://static.usrfiles.com/ugd/ee4a13_159c237b22d1484d884f44f2c383b98f.pdf
- https://static.usrfiles.com/ugd/b8c837_912440e77ed84e83bf6efcd6eb7d9f54.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_off0001d3fa.bin` `f1bfff9a106ae140b16e36123d723a74cc59e17acbd0bf70c930c0d63059f923`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1D3FA	5068 bytes
`font_01_sfnt_off0001e556.bin` `97fa5eb85b7c0e76bebc1a13fca9530d9aa8aac979420fbbbaa8d11241c47369`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1E556	15516 bytes

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