PDF malware analysis — malicious · 2bc1c22a1c8a1806

MALICIOUS

PDF

33.7 KB Created: 2020-08-30 19:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 314bb3f98e20e633fde67227c494459e SHA-1: 8c6f0ec8a3e3955b6d8f9c539c706d06ed3fe9bc SHA-256: 2bc1c22a1c8a18069cbaf155c6f41d086db071a2c284b03bd8a4e81ab001cebc

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link points to a suspicious URL that is likely used to redirect users to malicious content. The PDF also contains a link farm heuristic, suggesting an attempt to game search engines or distribute links broadly. The ML classifier strongly flagged this PDF as malicious.

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=sociology+of+religion+malcolm+hamilton+pdf
- https://cdn.shopify.com/s/files/1/0431/3343/6055/files/trading_in_destiny.pdf
- https://cdn.shopify.com/s/files/1/0433/3794/1160/files/56900133428.pdf
- https://cdn.shopify.com/s/files/1/0432/3799/8754/files/gatejumefapowutusur.pdf
- https://cdn.shopify.com/s/files/1/0431/4578/9600/files/53587621822.pdf
- https://static.usrfiles.com/ugd/e3834b_63187d8f25db46a38a197ecb44e63bec.pdf
- https://static.usrfiles.com/ugd/accd1f_23f341ed334c4638adf36c199ff6b0c2.pdf
- https://static.usrfiles.com/ugd/b8c837_c080850913a1470aabe575ec17ed4d95.pdf
- https://static.usrfiles.com/ugd/b8c837_c22b1b2e990942fdb564d53f60248541.pdf
- https://cdn.shopify.com/s/files/1/0432/2564/5211/files/43025756994.pdf
- https://cdn.shopify.com/s/files/1/0430/7327/4018/files/35375824553.pdf
- https://cdn.shopify.com/s/files/1/0435/4975/3507/files/74555596480.pdf
- https://cdn.shopify.com/s/files/1/0431/2642/3701/files/lifefekakoruziban.pdf
- https://cdn.shopify.com/s/files/1/0434/0203/5351/files/jabizebizeribaluzug.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_off000047d6.bin` `5335e9b51e3cff4ba3de86516f0965c2beb2aec007b8d93fcd163db2e4373bf0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x47D6	5596 bytes
`font_01_sfnt_off00005a9e.bin` `9cb193b62779f32c57c56d82b852241798a2317909563220610c8ad20249a031`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5A9E	9320 bytes

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