PDF malware analysis — malicious · b6d65bb8f67331cd

MALICIOUS

PDF

41.7 KB Created: 2020-09-02 06:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f773803be70c58e191e67494cd5ba9e1 SHA-1: 7d11e5c329d7a9d0523b9fac03d61886a83cc127 SHA-256: b6d65bb8f67331cd2642070cd05948692644da715e6e07ceb5b2d6024a234a07

152 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically disguised as a search result for 'beautiful baby boy photo'. The ML classifier strongly indicated maliciousness, and the PDF structure includes numerous external links, many hosted on Shopify, likely for SEO manipulation to obscure the malicious redirector. The primary malicious IOC is the redirector URL.

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.link/wix?keyword=beautiful+baby+boy+photo
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nazowexoratusitufunu.pdf
- https://cdn.shopify.com/s/files/1/0437/3266/4481/files/the_underground_fat_loss_manual_resu.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kevimofurerofujasopam.pdf
- https://cdn.shopify.com/s/files/1/0429/6887/5157/files/brevet_reporte_reunion.pdf
- https://cdn.shopify.com/s/files/1/0452/6243/8560/files/belaxewegowubupiru.pdf
- https://static.usrfiles.com/ugd/e4a001_dcff922d9de84d069e7b875bd78f492a.pdf
- https://cdn.shopify.com/s/files/1/0429/3266/6524/files/43965767279.pdf
- https://cdn.shopify.com/s/files/1/0428/1267/0111/files/74465376558.pdf
- https://cdn.shopify.com/s/files/1/0430/2359/7725/files/35333977211.pdf
- https://static.usrfiles.com/ugd/cfbfd2_a9a8809213394abaadfce70beec1e2e3.pdf
- https://static.usrfiles.com/ugd/eb6612_2265b27a85d749188ceb5394676c6258.pdf
- https://static.usrfiles.com/ugd/e32576_d6801363667645afbb95125fc9a41508.pdf
- https://static.usrfiles.com/ugd/f64db8_39463b26dd6142a88f086022df5bae00.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_off000065db.bin` `e625b04d9edd3a0d54a7566a622fd5bfa6e085f78d9fab7d356668560a71f9c1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65DB	5004 bytes
`font_01_sfnt_off000076ee.bin` `4f0527c707a7beefa2aff2468be486a71769fd305a00b2609562a3d642f23b7d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x76EE	10444 bytes

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