PDF malware analysis — malicious · 29e0805f2323a07a

MALICIOUS

PDF

40.8 KB Created: 2020-08-23 02:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: dcddd7973610ce0c549a15e4259d2c9c SHA-1: 6e8a08a9f6591360abcd45846ddc90539fe985fa SHA-256: 29e0805f2323a07aca7f7ca478b7cc063d3ea6d500d230ddc8ff20d30e9304c4

152 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains a large number of embedded links, many pointing to PDF files hosted on Shopify. One of these links, https://ttraff.com/pify?keyword=egd+anesthesia+guidelines, redirects to a known malicious domain, indicating a phishing or redirection attempt. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm and a malicious redirector suggests an attempt to lure users to malicious content.

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.com/pify?keyword=egd+anesthesia+guidelines
- http://rotinav.guitarelegance.com/uploads/1/3/1/4/131438096/05e093.pdf
- https://cdn.shopify.com/s/files/1/0430/3529/5905/files/67400778737.pdf
- https://cdn.shopify.com/s/files/1/0434/1848/4885/files/77196145876.pdf
- https://cdn.shopify.com/s/files/1/0432/2567/7982/files/ielts_simon_reading.pdf
- https://cdn.shopify.com/s/files/1/0432/1594/5890/files/java_complete_tutorial_for_beginners.pdf
- https://cdn.shopify.com/s/files/1/0434/3549/1490/files/xupukixunedetev.pdf
- https://cdn.shopify.com/s/files/1/0437/5045/7505/files/19626985758.pdf
- https://cdn.shopify.com/s/files/1/0430/0469/0581/files/lemeso.pdf
- https://cdn.shopify.com/s/files/1/0432/2073/0020/files/filomabikikebafigipitot.pdf
- https://cdn.shopify.com/s/files/1/0435/2134/3647/files/sejadomi.pdf
- https://cdn.shopify.com/s/files/1/0428/6929/3223/files/44047751551.pdf
- https://cdn.shopify.com/s/files/1/0430/0383/8615/files/1-_99_melee_guide_rs3.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_off000061d3.bin` `1c852b998ec4584fc87b4a82cd15ce21002d96c32f3b00f517772c5e8da18055`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61D3	4948 bytes
`font_01_sfnt_off000072a7.bin` `7fdc0c14c4b5b7d23eb9d9f8d007873d58fc42bf288e25a09d677aa4738b6340`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72A7	10780 bytes

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