PDF malware analysis — malicious · 76acc5cc29b9d737

MALICIOUS

PDF

38.2 KB Created: 2020-08-19 06:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f1cabad0474b8db20baf08fb2f451645 SHA-1: 7ca26a8caa02e8bb67bb6371b5f7443623941fbc SHA-256: 76acc5cc29b9d737ee797aaa4c2eb9e63322da730e34d2ab2fb9147a5e131637

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by a machine learning classifier and contains a large number of embedded links to PDF files hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=chucklefish+stardew+valley+android', is a known malicious redirector. This suggests the document is part of a link farm designed to lure users to malicious content, likely for phishing or malware distribution. No scripts were extracted, and the document body was heavily obfuscated.

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/pify?keyword=chucklefish+stardew+valley+android
- http://files.heykatedewey.com/uploads/1/3/2/6/132681976/bewufoko-vanikedo-zafokajumoso-powedilemepefig.pdf
- https://cdn.shopify.com/s/files/1/0433/6664/5916/files/knee_isometric_exercises.pdf
- https://cdn.shopify.com/s/files/1/0428/3524/7271/files/rotupid.pdf
- https://cdn.shopify.com/s/files/1/0432/3350/9534/files/17137303191.pdf
- https://cdn.shopify.com/s/files/1/0431/5322/7936/files/biriga.pdf
- https://cdn.shopify.com/s/files/1/0428/7853/3799/files/65764423397.pdf
- https://cdn.shopify.com/s/files/1/0431/5129/4628/files/bach_barenreiter.pdf
- https://cdn.shopify.com/s/files/1/0431/5889/6802/files/holberg_suite_rigaudon_sheet_music.pdf
- https://cdn.shopify.com/s/files/1/0432/8059/7152/files/66052156736.pdf
- https://cdn.shopify.com/s/files/1/0434/3191/9765/files/46399499961.pdf
- https://cdn.shopify.com/s/files/1/0428/1355/4855/files/8038862209.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_off0000567d.bin` `f54abf85a70a589d459a5c58f9af4061d338466813840128d509d6f7492054e9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x567D	5332 bytes
`font_01_sfnt_off000068b5.bin` `03634b6e92849a99573fc3c3410ba72604edd5101f0471c2586b48d3bddace17`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x68B5	10364 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.