PDF malware analysis — malicious · 6b803af7c543f1d1

MALICIOUS

PDF

51.2 KB Created: 2020-10-27 00:45:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: 624de03a2d51dadf79c69b785fcd934f SHA-1: 832499a06a9b6a7776f7fef7772d85017f6a336f SHA-256: 6b803af7c543f1d171fb5556d6b62b0810fc3fb783329fcb90d552aab51d36ce

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://gettraff.ru/wb?keyword=definition%20of%20credibility%20in%20research%20pdf'. The document body also contains this URL, suggesting it's the primary lure. The ML classifier strongly indicates maliciousness, and the presence of numerous external links, some benign and some unknown, points towards a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the redirector URL is the main IOC.

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://gettraff.ru/wb?keyword=definition%20of%20credibility%20in%20research%20pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4411501/normal_5f95bf34ced51.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370286/normal_5f8a6d76a720e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367940/normal_5f8b6c2a15667.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420917/normal_5f96673067293.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369763/normal_5f88f2bb7ade9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412607/normal_5f93e5da9dce0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382413/normal_5f94bd074f10d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4384295/normal_5f8dd08d9be90.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.opentle.orgIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://cdn.shopify.com/s/files/1/0484/8307/4209/files/political_law_reviewer_2019.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/6790/0061/files/la_metrolink_route_map.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/8846/1478/files/derecho_procesal_penal_roxin.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0266/8570/2344/files/mac_os_system_crash_log.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0266/9346/8331/files/cormac_mclaggen_x_harry_potter.pdfIn PDF document text
- https://s3.amazonaws.com/gupuso/napilubonemabozepunene.pdfIn PDF document text
- https://s3.amazonaws.com/tujeviwakirawu/forojevozivopifakuvikim.pdfIn PDF document text
- https://s3.amazonaws.com/zaxawetawupo/fever_temperature_chart.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/68e16a41-a06b-4a56-ad45-374b6bd4eeba/69828940705.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0767307a-6cc3-4a33-9306-ab16456bba60/poeme_d_amour_victor_hugo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d44c4235-daf3-4f87-87d6-b696135c12f3/luwekurubidofazixozajo.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006a1e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A1E	5272 bytes
SHA-256: `56bb8e3a49b1a281ed930d69d44677b84b110b754d083c77dc8fdbd01f4c6bb9`
`font_01_sfnt_off00007bf3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7BF3	6104 bytes
SHA-256: `724f68f3841fe8baa27704fd99e4756260763756d78af26b682bb86d2cd3fbbc`
`font_02_sfnt_off00008bac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8BAC	11004 bytes
SHA-256: `69d2645cf9dce1edd0c37d54d40a995567b089ef389e2d05109ffe5527dfa759`
`font_03_sfnt_off0000b117.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB117	4324 bytes
SHA-256: `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`

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