PDF malware analysis — malicious · af6b15fd9acf6b77

MALICIOUS

PDF

39.9 KB Created: 2020-11-03 13:18:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27

MD5: bb4c6854fe477442323e6abb7451c9f5 SHA-1: 72326ae137bd231a889246ac04d4c28d026300a8 SHA-256: af6b15fd9acf6b773711b9386eff4bed92dfe8d0fa7e2956102316a518af0988

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document functions as a link farm, containing numerous embedded URLs that point to other PDF files hosted on various disposable domains. One of the primary URLs, 'https://gettraff.ru/aws?keyword=i+like+to+learn+asia+map+quiz', is flagged as a malicious redirector. The extensive use of external links and the presence of a malicious redirector suggest an attempt to manipulate search results or lead users to malicious content, likely as part of a phishing or SEO poisoning campaign.

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.
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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://gettraff.ru/aws?keyword=i+like+to+learn+asia+map+quiz In PDF document text
- https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/1a0728c03.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4410015/normal_5f95d5325eb16.pdfIn PDF document text
- https://zirasave.weebly.com/uploads/1/3/4/0/134096010/7525620.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389370/normal_5f98ae28a1274.pdfIn PDF document text
- https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/9493284.pdfIn PDF document text
- https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/d4f70825.pdfIn PDF document text
- https://tosofovopige.weebly.com/uploads/1/3/3/9/133998067/putizupigido.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417413/normal_5f9afe94a1820.pdfIn PDF document text
- https://kanudepu.weebly.com/uploads/1/3/2/7/132740929/jivibusudatu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369923/normal_5f88a712e9e93.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/2f8cb281-c6df-415e-b5d1-0ec3ff90b991/lawesadorukenijevopeg.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b790560f-f21c-4059-b7f8-9e3f7799d913/2014_ap_calc_ab_free_response.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2cae4cb3-89b6-44ac-abd3-bc811bfdb969/47303474434.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9fcce431-cfb0-4ac6-a5d6-370af0da1280/ponixitudigeroxugatuw.pdfIn PDF document text
- https://s3.amazonaws.com/nafoxuda/remington_woodsmaster_742_magazine.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/32431005-0352-4085-b776-1f74e696e357/77434821042.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004944.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4944	5140 bytes
SHA-256: `c1022cc7f8b5be1c76a075cf2fe67b8a0fe663354bb42a4f4b8888ef55a8d310`
`font_01_sfnt_off00005ab2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5AB2	10292 bytes
SHA-256: `8fe6b3c62f3d0677206d3881e21f142385f501a258ec7b3529c2afd77ee7648c`
`font_02_sfnt_off00007ded.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7DED	16076 bytes
SHA-256: `75fb5eda6c80430b94b20cb0daa906e0e98a9f633c3ecfcf71c743d7414a59fc`

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