PDF malware analysis — malicious · e3b35b8b98d88cda

MALICIOUS

PDF

50.8 KB Created: 2020-09-09 08:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 17a866ddcfffcf9e359505cf2484c2ca SHA-1: 969d21df12a479ce7bf00237a25cfee986705a57 SHA-256: e3b35b8b98d88cda7c7df7995a1ce725270b8e9494a2b848e73dfa181cb01f10

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm with multiple embedded URLs, including a primary malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains text related to 'travel log book template australia' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous external PDF links points to a link farm SEO strategy.

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.me/wix?keyword=travel+log+book+template+australia
- https://cdn.shopify.com/s/files/1/0428/8181/0595/files/69868980343.pdf
- https://cdn.shopify.com/s/files/1/0440/2269/4046/files/sazuvu.pdf
- https://cdn.shopify.com/s/files/1/0437/4557/5061/files/fimarum.pdf
- https://cdn.shopify.com/s/files/1/0431/8478/3509/files/sorikatidifav.pdf
- https://static.usrfiles.com/ugd/a771bd_dad442960997495fbe23bfd4ad6818de.pdf
- https://static.usrfiles.com/ugd/c268f7_60800a6bcca8402daf00943464d9c0b2.pdf
- https://static.usrfiles.com/ugd/0789d5_a682fa325ace46e597a87538817ff5e5.pdf
- https://static.usrfiles.com/ugd/4cd51e_f3f31f37cd7946e3b9195926f986758c.pdf
- https://static.usrfiles.com/ugd/18122d_b6dd89a94d5f489d9035e774d0bb3f64.pdf
- https://cdn.shopify.com/s/files/1/0430/3116/7137/files/wuvuraroxe.pdf
- https://cdn.shopify.com/s/files/1/0428/9026/4742/files/nonolonabez.pdf
- https://cdn.shopify.com/s/files/1/0433/7339/6133/files/sevisedexizepati.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_off000088c1.bin` `9fad285b4582faa7a951c20e6256c400119a9909feec1ebe3b7f3fb20d7977e2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88C1	5352 bytes
`font_01_sfnt_off00009ae9.bin` `a666b9da04b6a2f78b7fa0e26f3cf2e46980744c816da78acee6ad45a44e655e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9AE9	10296 bytes

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