PDF malware analysis — malicious · 71d81888843b191f

MALICIOUS

PDF

40.4 KB Created: 2020-10-29 22:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 625d189a0101e0a2637e1664391b5470 SHA-1: 7b166ff77765f7e1d9f0b1eadf89f4bb329cd74a SHA-256: 71d81888843b191f087e9d69f35492170396c6eb619c96b79ef2b555cc2f4f49

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.me/123?keyword=bain+middle+school+park'. The ML classifier also flagged this PDF with high confidence. The document body contains obfuscated text but also the aforementioned malicious URL, suggesting an attempt to trick the user into visiting a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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/123?keyword=bain+middle+school+park
- https://cdn-cms.f-static.net/uploads/4379736/normal_5f8ae601336e8.pdf
- https://cdn-cms.f-static.net/uploads/4366327/normal_5f912bd67b2ab.pdf
- https://cdn-cms.f-static.net/uploads/4369626/normal_5f8d16d2568ce.pdf
- https://cdn-cms.f-static.net/uploads/4389090/normal_5f918c0d0f504.pdf
- https://cdn-cms.f-static.net/uploads/4368222/normal_5f88ba9025258.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://uploads.strikinglycdn.com/files/18037a43-31ab-4d6b-9e1a-bc1c04284e6e/elettrotecnica_dispense.pdf
- https://s3.amazonaws.com/luramamelolem/sportline_pedometer_manual.pdf
- https://uploads.strikinglycdn.com/files/b3ca3204-d0cd-4938-9246-60ac05fbdff5/xudazaxufedelikipu.pdf
- https://s3.amazonaws.com/tetazino/fundamental_breach_of_contract.pdf
- https://uploads.strikinglycdn.com/files/4a0ec1db-eaa3-422a-8d5c-0e3f4572e237/trev_max_min_problemleri.pdf
- https://uploads.strikinglycdn.com/files/1099787f-6c6b-4d30-b43e-c27893d827de/8642365581.pdf
- https://uploads.strikinglycdn.com/files/0dfe0900-4be7-4faa-a176-d36de8228f33/96661303519.pdf
- https://s3.amazonaws.com/pazifetanegapu/dewuwevisoro.pdf
- https://uploads.strikinglycdn.com/files/eb8304dc-20b4-443e-b08a-b562208d7d10/shaadi_mein_zaroor_aana_2017_full_mo.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_off000060c0.bin` `5efee85acd5bce683bf0429608fbfb4a8c765bc41cd4c263690a5d9721fc5b15`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60C0	5428 bytes
`font_01_sfnt_off00007309.bin` `1164f095d4750a8a248b7cf29279017e9c7496c651dad37dcc0742fb14a4621a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7309	10084 bytes

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