PDF malware analysis — malicious · ca49ea435ec9f6b5

MALICIOUS

PDF

43.8 KB Created: 2020-08-29 06:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d6b212fbcea2a828744e980fb3016527 SHA-1: a4a4f1b8cb4f433177ef06fd622c26a3888f08ae SHA-256: ca49ea435ec9f6b5c80a7924358be320f82a43d22f62da6b68dcb26161278394

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, 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 and keywords suggesting a lure. The presence of numerous other links to static.usrfiles.com, while marked as benign, indicates a link farm strategy, potentially to improve SEO for 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.ru/wix?keyword=shadowing+technique+pdf
- https://static.usrfiles.com/ugd/b8c837_65a89d287a984481afab65a9a83a6242.pdf
- https://static.usrfiles.com/ugd/b8c837_5ff26027bea34790ad2ae5feb0bfd212.pdf
- https://static.usrfiles.com/ugd/b8c837_2416ac1a9c6341dfa49e44188597864c.pdf
- https://static.usrfiles.com/ugd/b8c837_3da18023befa43ed9d4ec3fe143e4c6e.pdf
- https://static.usrfiles.com/ugd/b8c837_4f4d10fadc8d46719750554383c70777.pdf
- https://cdn.shopify.com/s/files/1/0429/5737/3589/files/petekinebujuxono.pdf
- https://cdn.shopify.com/s/files/1/0429/8942/0695/files/55418200771.pdf
- https://cdn.shopify.com/s/files/1/0437/1962/2808/files/75895351110.pdf
- https://static.usrfiles.com/ugd/b8c837_1378105b1452451aa90b44311c904eac.pdf
- https://static.usrfiles.com/ugd/b8c837_998c35b929f94114bcb44703786bc381.pdf
- https://static.usrfiles.com/ugd/b8c837_24029676a1e841fd88e991b941f4c2c0.pdf
- https://static.usrfiles.com/ugd/b8c837_faaf3c9e0281428e8953186c81dee55c.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_off00006ccd.bin` `236a4322fe006791527db510adf93c671aa492edfc114181a11d5fa74c10f80f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CCD	5432 bytes
`font_01_sfnt_off00007f52.bin` `9f161a1f7636840ad82ed0dd5ef7eb349b53f75d760fb23e2d01e94e63b2e167`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F52	10264 bytes

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