PDF malware analysis — malicious · 8ce29ce1bc17372b

MALICIOUS

PDF

34.7 KB Created: 2020-09-07 12:34:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: dda9b2d1bdc07e337f6d8c9c377baadf SHA-1: 2ddead444229778a7d4194da762f09b809c3f4ae SHA-256: 8ce29ce1bc17372bb1603bed6fef3a4b21c9689fb376747221df047e58d2adf9

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.club). This indicates a link farm designed to obscure the ultimate destination of the malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector URL confirms a malicious intent to lead users to harmful sites.

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.club/pify?keyword=chapter+20+oxidation-+reduction+reactions+worksheet+answers
- https://static.usrfiles.com/ugd/111c46_fad9b32493e34c0fadcc94c25df02a7a.pdf
- https://static.usrfiles.com/ugd/822ecd_54d19cf10bcb427fbba06dba11a011d4.pdf
- https://static.usrfiles.com/ugd/bdeb4c_a015081e33e146cb9b5dd18a37ede028.pdf
- https://static.usrfiles.com/ugd/f3ecbe_0e1a002f30f8452f9b041fc3fd508221.pdf
- https://static.usrfiles.com/ugd/19ce5d_9be320e97e7f45fa9e49906ef2851959.pdf
- https://static.usrfiles.com/ugd/764aaa_562373f7a1844a209339b6b20acb9c59.pdf
- https://cdn.shopify.com/s/files/1/0430/0311/7721/files/angular_5_template_form_validation_on_submit.pdf
- https://cdn.shopify.com/s/files/1/0429/2352/4259/files/cintas_logo.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojedeteremedadedarovir.pdf
- https://cdn.shopify.com/s/files/1/0433/8656/8860/files/kuiken_brothers_moulding_design_guide.pdf
- https://static.usrfiles.com/ugd/909b15_104448f2a0ca41ba96bb12891ace4c8b.pdf
- https://static.usrfiles.com/ugd/40512e_3e8cf03be4094a2bbdb3ac835e46e7f1.pdf
- https://static.usrfiles.com/ugd/c46c8a_e7ece9271b5343a0998a87dad6559ba4.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_off00004a4d.bin` `21d1d15755f27a87f45a5db92be8d92ca58dc8f2100a096fe9e36435f391637f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4A4D	5564 bytes
`font_01_sfnt_off00005d47.bin` `c30e21dffc2c193fe49e6f721d993e43a901f42fc2e6c55b570fc843871bf94d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D47	9592 bytes

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