PDF malware analysis — malicious · cf381353ea0e66e6

MALICIOUS

PDF

46.9 KB Created: 2020-10-17 20:34:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: 0492c9766968d92c18824302cf194c79 SHA-1: fa5015791d469e50a13b73ce48147b22ec2c5f9e SHA-256: cf381353ea0e66e64c5eb2d49a10f1d2504e3cd9a2b5cbfa17d8ea5cc81e40f9

162 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, specifically pointing to 'https://ggtraff.ru/123?keyword=download+utorrent+apk+for+android+free'. Additionally, it exhibits characteristics of a PDF link farm, suggesting an attempt to distribute or redirect to other malicious or spam content. The presence of a 'download button' lure reinforces the malicious intent.

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.
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://ggtraff.ru/123?keyword=download+utorrent+apk+for+android+free In PDF document text
- https://cdn-cms.f-static.net/uploads/4379045/normal_5f8b079a66056.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366989/normal_5f8a702be3b95.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368243/normal_5f87ac0f12e02.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366336/normal_5f871ed1299cb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365627/normal_5f8702f690cb9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367687/normal_5f8752dec58b1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366377/normal_5f8750932ceb6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367302/normal_5f873deee649c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367308/normal_5f88fa35d7597.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369330/normal_5f889d46b40c9.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/1/0494/0031/6071/files/29020432203.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/5060/5983/files/relative_pronouns_exercises_with_answers.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/1433/2309/files/wulejipugos.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0502/4717/2269/files/60604397842.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/15884da6-4d3b-494f-b0c3-97883ced349a/70779022807.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dd8b13c2-ab24-4af1-9ad3-e3c0d229a413/segapiv.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/79553eb6-bdb6-4aaf-9de6-4cfc39795adf/83350010521.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e8813192-3424-4d0c-8681-ea695d6439ea/sezolasemobotogowus.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4416f379-d486-46de-8b31-0ef70e5e60d9/pawezibupogatexesi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/51a8a422-fc28-49b7-bcc6-9a93fd663c05/bikakixerofimadatiduduvar.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_off0000624c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x624C	5012 bytes
SHA-256: `53d71b55fbf9f3145708fd142c8d9a3ca85c3c463678fe3d8e5621859cefc0c5`
`font_01_sfnt_off00007386.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7386	10832 bytes
SHA-256: `7f51c35d980e5a52f1660d1060a83a45920f6d8b80b63a5ab8991b55fcc5c34f`
`font_02_sfnt_off000098b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x98B7	16144 bytes
SHA-256: `764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf`

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