PDF malware analysis — malicious · af4246a0bac6057e

MALICIOUS

PDF

40.8 KB Created: 2020-11-02 15:28:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26

MD5: 9aacf688b50ccfb0a64a24adbfd2a946 SHA-1: cd54ddc4c3d7a5eb080f551b63a7abffcb245c88 SHA-256: af4246a0bac6057e7d85e1d3decf51a704ea4c507ec90e98b34e2822e7504bb0

224 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document contains a large number of embedded links, many of which point to disposable hosting and redirector infrastructure, indicating a link farm designed for SEO manipulation or malicious redirection. The document body, though obfuscated, contains a URL that appears to be a lure related to a Windows error, likely intended to trick users into clicking malicious links. The presence of a ClickFix heuristic further suggests social engineering to prompt user interaction with malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

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.
ClickFix social engineering attack high SE_CLICKFIX

Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
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/123?keyword=0xc000012f+error+windows+10 In PDF document text
- https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/4488803.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424341/normal_5f9b39cdbdd66.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368481/normal_5f89dfbe6ef3a.pdfIn PDF document text
- https://femekeviwafuga.weebly.com/uploads/1/3/4/3/134345727/0fe64ad055be1d8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369928/normal_5f8963117dc9e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374002/normal_5f896a8bb3876.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367310/normal_5f8e51ec0c1e4.pdfIn PDF document text
- https://kalodobig.weebly.com/uploads/1/3/4/4/134432105/bevesusapuregozix.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369923/normal_5f99303cc4b40.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4411219/normal_5f992a55eaabf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370064/normal_5f9bdf6ed24d0.pdfIn PDF document text
- https://rexolofozex.weebly.com/uploads/1/3/4/3/134368018/nebabixobigigi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387424/normal_5f8dc41c2a749.pdfIn PDF document text
- https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/9755694.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4421215/normal_5f9a25ec4b2dd.pdfIn PDF document text
- https://varipejat.weebly.com/uploads/1/3/0/7/130739080/pevoxiravuwe.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/f5db0da2-33d3-46f7-8f21-be9d414b837b/vewuloxivaletojupeg.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8579d91b-52e7-415a-90da-ca48fd2c458d/9510701483.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_off00006100.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6100	5164 bytes
SHA-256: `52a5f978ccbb81feb704f0cfe4ad08d6e3e140bc68776515bb4e311abe281fe8`
`font_01_sfnt_off000072c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72C3	10424 bytes
SHA-256: `13ff5fe8d3c23322fb090edc8603d0d2ab37dd9b6f7416ee72c322453d184c81`

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