PDF malware analysis — malicious · 44bcb92c0e17ba44

MALICIOUS

PDF

40.6 KB Created: 2020-10-21 20:39:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 58851971067786b568e85afe2829a978 SHA-1: efdf09396c6561149a9f558e3e60df69e7b4c6f0 SHA-256: 44bcb92c0e17ba44d1a24ab829fbb16b5fec534ca7d0d66a6c4f7c080b165a55

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/123?keyword=convert+pdf+word+en+ligne'. While the document body is heavily obfuscated, it does contain a reference to this URL. The presence of a QR code lure and a download button, though low-signal individually, support the overall malicious intent of directing the user to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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.ru/123?keyword=convert+pdf+word+en+ligne In PDF document text
- https://cdn-cms.f-static.net/uploads/4368970/normal_5f87d42cc2033.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381102/normal_5f904eb45f875.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371248/normal_5f88cb10269a1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369914/normal_5f8a250ce3f70.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382961/normal_5f8f97e4bfcbf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366024/normal_5f8740d13f474.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381104/normal_5f8d59f7b387e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381095/normal_5f8b7c3068df8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381094/normal_5f8df4d88268a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378149/normal_5f8ab273983f1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375339/normal_5f8d43b42f9d6.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/tetazino/sanamifepudujeju.pdfIn PDF document text
- https://s3.amazonaws.com/zuxadol/zofudabumapetimezave.pdfIn PDF document text
- https://s3.amazonaws.com/tetazino/42504166907.pdfIn PDF document text
- https://s3.amazonaws.com/mijedusovineti/2839324963.pdfIn PDF document text
- https://s3.amazonaws.com/wonoti/67665484127.pdfIn PDF document text
- https://s3.amazonaws.com/zirojopemup/benzoin_condensation_mechanism.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files/kekosovevu.pdfIn PDF document text
- https://s3.amazonaws.com/subud/cahier_de_vocabulaire_et_grammaire_french_2.pdfIn PDF document text
- https://s3.amazonaws.com/zetare/racq_pet_insurance_claim_form.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8b9e2a30-8970-482f-8e3c-ebff656082e6/ielts_advantage_writing_skills_answer_key.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4822cd07-8026-4dd2-bd07-d76de4c7747d/4168163443.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3bba6f33-054d-46b9-8882-03cb5d914382/ledabotulukulexivefim.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/12660538-773b-47b3-9102-9c6c1b25c694/fozivojejipizaravivapo.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000564e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x564E	3016 bytes
SHA-256: `58d72bf77caf06f196ded4b34c89bed61a9c4a6ede306bb0efd38173e7a75772`
`font_01_sfnt_off00006106.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6106	4876 bytes
SHA-256: `f6bc3d93663dcf3a3ac9a86b4c2a8b56763c9e8b432f9fb97014f7cb19818523`
`font_02_sfnt_off000071ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71CA	10176 bytes
SHA-256: `3e46e4b5193d5ed127f26b87acd19ecf7c6f3b359f44de16b7b9f36c1e0c78bd`

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