PDF malware analysis — malicious · 5487efb708f82d7d

MALICIOUS

PDF

50.6 KB Created: 2020-10-27 13:20:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27

MD5: 2d6c31946024e9219b98600b590b5ffd SHA-1: 1da06c9972e25f3e1a224c84ced888725b63b146 SHA-256: 5487efb708f82d7d9e5da9b93c813f2004545fc2e668daa7c39d478db0022c69

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to what appears to be a link farm designed to generate SEO traffic. One prominent link, disguised as a search result for 'Xbox 360 cooling fan', directs to a malicious redirector. The ML classifier strongly indicated maliciousness, and the PDF structure itself is suspicious due to the excessive linking.

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://ttraff.com/123?keyword=xbox+360+cooling+fan In PDF document text
- https://zitajajelenineb.weebly.com/uploads/1/3/4/5/134512459/tigexeve-limawumorelopor-wibigijag-sumon.pdfIn PDF document text
- https://fexatawolev.weebly.com/uploads/1/3/4/4/134445796/papataragujab.pdfIn PDF document text
- https://vujofuda.weebly.com/uploads/1/3/4/3/134375628/491170e179.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367301/normal_5f8aa1744dae9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369922/normal_5f9728424a249.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409797/normal_5f950e2a431a7.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://cdn.shopify.com/s/files/1/0432/2174/5823/files/police_interview_questions_and_answers_download.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0479/2995/0375/files/coda_shop_mod_apk.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/2836/3939/files/asos_uk_plus_size_guide.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/0675/3948/files/echo_310_chainsaw_manual.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/78272a6e-ef38-496b-8815-39822266893d/56769721150.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/effa6290-1783-4f9b-90a1-a4d42f0e626c/kuzak.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8b1287df-7f48-44ff-804b-c5abc10f93cd/87930826451.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/44f91508-3040-4163-a05f-90cf13569b52/65780105406.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/94c2eca9-6124-45a2-9f09-ff83a1b67f11/zidamezos.pdfIn PDF document text
- https://s3.amazonaws.com/waxapoz/53105897413.pdfIn PDF document text
- https://s3.amazonaws.com/zirojopemup/51622876189.pdfIn PDF document text
- https://s3.amazonaws.com/wapabefizosumi/zares.pdfIn PDF document text
- https://s3.amazonaws.com/vavale/lubisovoner.pdfIn PDF document text
- https://s3.amazonaws.com/sugowubuf/captain_marvel_comic_story.pdfIn PDF document text
- https://s3.amazonaws.com/zurovajij/html_tags_list.pdfIn PDF document text
- https://s3.amazonaws.com/lanorolowu/the_story_of_my_life_class_10_summary.pdfIn PDF document text
- https://s3.amazonaws.com/fasanag/alimentacion_saludable_durante_el_embarazo.pdfIn PDF document text
- https://s3.amazonaws.com/genedonapubefe/27536254962.pdfIn PDF document text
- https://s3.amazonaws.com/pexodugosa/biology_11th_ncert_book_download.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_off00007a08.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A08	5012 bytes
SHA-256: `4b477a72d6b61771d60eac77a8aa7d9ee1ad90b7c6bcbf90f087521cb0b48e35`
`font_01_sfnt_off00008b10.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B10	11052 bytes
SHA-256: `5dd0040335e2cae66610269113b45cb4e2f773bb378d3bcee6380717343d7609`
`font_02_sfnt_off0000af04.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAF04	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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