PDF malware analysis — malicious · 14c0ac94f2b256c6

MALICIOUS

PDF

50.6 KB Created: 2020-10-30 23:20:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27

MD5: f06a52601ca71dd1ac2af78783d01b9b SHA-1: 841af326518e72d8dc440161fa4d4dea1756d8aa SHA-256: 14c0ac94f2b256c688336e92a163e9eb2a345dd8e5be3d8ec760654eddaccf94

94 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=network+study+guide+2015+pdf'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL embedded within the document content strongly suggests a phishing or malware delivery attempt, likely initiated via spearphishing.

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.ru/123?keyword=network+study+guide+2015+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4374013/normal_5f91c68152e64.pdfIn PDF document text
- https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1515306.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389394/normal_5f97be854760f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369153/normal_5f8cc1259452a.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/3175/5932/files/19412759222.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/7152/7319/files/84342094349.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/14c9bba9-dbcd-4ff4-accd-6ba89c30c05f/pebumojuxuzu.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0503/4390/3428/files/raspberry_pi_3_b_android_stable.pdfIn PDF document text
- https://s3.amazonaws.com/migivewuwe/abnormalities_of_placenta.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/028b027d-4b3c-4a75-a712-3a38462d4ef4/51931221003.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000083df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83DF	5644 bytes
SHA-256: `84dae18befd4c87bb8f70721d62a67047a586ec70cedbeb22a7c7d00177db854`
`font_01_sfnt_off00009759.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9759	11308 bytes
SHA-256: `9f4ee1069b9e9a1797d7136bf165771b863b757a28163cf45de9017cd7840dd3`

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