PDF malware analysis — malicious · 5e6733c820b12430

MALICIOUS

PDF

42.5 KB Created: 2020-08-15 03:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e83cb6da16b0dfee97ae1ab1a9c1fc82 SHA-1: cdb4265696378a6ab82b09c529f1a8df4fd78672 SHA-256: 5e6733c820b12430c709954b5a2ba1af455299d1b216665d483679e60725e89f

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to malicious infrastructure, specifically `https://ttraff.com/pify?keyword=restaurant+billing+android+app`. This URL is presented as a lure for a 'restaurant billing android app'. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the malicious destination. 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.com/pify?keyword=restaurant+billing+android+app
- http://files.bedtimestory4you.com/uploads/1/3/1/3/131380126/7728094.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0434/0544/3237/files/23215766531.pdf
- https://cdn.shopify.com/s/files/1/0433/9820/1502/files/maxotetiv.pdf
- https://cdn.shopify.com/s/files/1/0429/1254/6975/files/71187243796.pdf
- https://cdn.shopify.com/s/files/1/0436/0860/4829/files/adobe_reader_offline_installer_for_windows_7.pdf
- https://cdn.shopify.com/s/files/1/0431/3631/9639/files/xobowevaloboleri.pdf
- https://cdn.shopify.com/s/files/1/0430/4656/8098/files/37842010908.pdf
- https://cdn.shopify.com/s/files/1/0433/4052/9816/files/ribak.pdf
- https://cdn.shopify.com/s/files/1/0432/6857/1299/files/bepeged.pdf
- https://cdn.shopify.com/s/files/1/0431/2940/5600/files/8197158929.pdf
- https://cdn.shopify.com/s/files/1/0435/7708/2019/files/61130891468.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000685b.bin` `fede5790e6878e4d12fb28c0550168c8e0f80323588607b4e998f22c35f8d988`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x685B	5276 bytes
`font_01_sfnt_off00007a4e.bin` `8e76d70a80ef663290842f6d6b1e4233140e21ef85d5e2c505214639ba2343eb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A4E	10272 bytes

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