PDF malware analysis — malicious · d729cb10cc626bbf

MALICIOUS

PDF

58.3 KB Created: 2020-10-25 03:55:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 65710ce8ab40a3d4f989a3aa4008a0d0 SHA-1: 964bd7ab9849f40a3eb1d5e82351835ef8712760 SHA-256: d729cb10cc626bbf64ecb67dba375fedd1c07936537e987e0f9ad23a4467cb9f

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, indicating an attempt to direct users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
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://ggtraff.ru/123?keyword=robbins+2020+comportamiento+organizacional+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4375209/normal_5f8dba0462b57.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367648/normal_5f89a69aa59c5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365567/normal_5f8fa4494efad.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365599/normal_5f87281ebd92a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379859/normal_5f8eb62f79e5f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368949/normal_5f8e2185571ce.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://s3.amazonaws.com/levumoduf/articulacion_de_chopart_y_lisfranc.pdfIn PDF document text
- https://s3.amazonaws.com/tadovu/90937739644.pdfIn PDF document text
- https://s3.amazonaws.com/gupuso/werokasasajefeniki.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0498/7679/5548/files/matorus.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0496/2815/1959/files/10823957891.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0266/9212/4864/files/80615075072.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/3097/3080/files/jipekuzif.pdfIn PDF document text
- https://s3.amazonaws.com/tadovu/hindu_calendar_september_2019.pdfIn PDF document text
- https://s3.amazonaws.com/memul/axis_bank_mutual_fund_cancellation_form.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/06af9a21-5f14-4251-9636-88e07469d0fe/nirasatitukalemabuzakiwes.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f77b55ca-98a4-43cf-a41f-1914477171db/84581238629.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3b6f4d56-38fc-482f-a550-19585918717f/pexezaka.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8e840ba7-0bf0-4fb8-9113-ca0145adb34b/vekusideg.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c7d81dd3-3b34-4fbd-911f-1f27d8e9370d/7776514742.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_off00009101.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9101	5736 bytes
SHA-256: `2c2aa466bfb6f67385f863b2c90b17002b26f386984d7bc4a97deff29a1fd164`
`font_01_sfnt_off0000a465.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA465	11944 bytes
SHA-256: `1184ae49e138f408949e6e40a6545faa75c249c48ce398d77e149c5eefc39427`
`font_02_sfnt_off0000cb20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB20	4324 bytes
SHA-256: `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`

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