PDF malware analysis — malicious · b5b8759866e8e13e

MALICIOUS

PDF

40.9 KB Created: 2020-09-08 22:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: db0c086402c58c60680adb406466b94d SHA-1: 44ef05b2746d14a5a05e010ab6b84cb2621ce110 SHA-256: b5b8759866e8e13ef9bdbba43e4ce2931ffe90bd41beb17e22828c2506e377a2

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely to obscure the malicious destination. The ML classifier strongly supports the malicious verdict.

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/wix?keyword=division+2+liberty+exotic+guide
- https://cdn.shopify.com/s/files/1/0433/0081/4998/files/1139314927.pdf
- https://cdn.shopify.com/s/files/1/0435/6793/9743/files/18741107147.pdf
- https://cdn.shopify.com/s/files/1/0440/8036/5733/files/west_coast_imagine_dragons_sheet_music.pdf
- https://static.usrfiles.com/ugd/2b25e8_9ccd6c94f38847529e1fed32c761e1a9.pdf
- https://cdn.shopify.com/s/files/1/0431/6866/1660/files/womekarisubirulemipa.pdf
- https://cdn.shopify.com/s/files/1/0432/5759/4011/files/12471477899.pdf
- https://cdn.shopify.com/s/files/1/0429/8804/4442/files/makuluwumulu.pdf
- https://cdn.shopify.com/s/files/1/0437/6051/7271/files/tidefananiralone.pdf
- https://static.usrfiles.com/ugd/d216cb_0e221c6e834f41e2a5a9339f1a700cd9.pdf
- https://static.usrfiles.com/ugd/1a89c8_6ec77d2798414898b0e2683d4af70b79.pdf
- https://static.usrfiles.com/ugd/a382ee_a9642485cd31464e9967b1502a66cc16.pdf
- https://static.usrfiles.com/ugd/66f7a0_9958f0851f4b4aafaa3bac419497adf3.pdf
- https://static.usrfiles.com/ugd/23924c_5737ace6a3b140338dcb03eda0defb6c.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_off00006169.bin` `ac1e48b3bdc23fa7df530135e154ac5f7fa79314dffdb708c73a9b9fc12c14d8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6169	5396 bytes
`font_01_sfnt_off000073e9.bin` `4e446e1f5730b40bb825ab2823d588a66835bdf165032deb493d38b4c8a929a9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x73E9	10292 bytes

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