PDF malware analysis — malicious · 4ae940758a50f98c

MALICIOUS

PDF

51.1 KB Created: 2020-10-24 17:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04

MD5: dfe29811caa10678de390a862dd38c6d SHA-1: ec27afa3f2b31ea18eb7193551a065b13f201f96 SHA-256: 4ae940758a50f98c2ebeaa60ac8c51f2678b301b4b483156b49b308efe96a038

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic, likely to obscure the malicious redirector. The ML classifier strongly indicates malicious intent.

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=cocteles%20sin%20alcohol%20pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4383918/normal_5f93f6d2ef95b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393883/normal_5f9111f93f714.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368781/normal_5f895aa847cd4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370263/normal_5f92374e0bd40.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372980/normal_5f8896a94830c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375541/normal_5f89b23e40bdd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382197/normal_5f93d7104f4f8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393026/normal_5f8f7131523f9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374521/normal_5f8b6dd6e58b8.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/bed16f45-815e-45cf-873e-935898d01211/90561929365.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b045ead5-5a68-4106-b340-8bb00a2de9ae/97852111365.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a4c813c3-2942-4167-93ae-d9f110b53ea4/61679410551.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/143a4c79-6b5d-4e14-99c4-106bda9f99bf/30497338561.pdfIn PDF document text
- https://s3.amazonaws.com/tesapibebujep/sirinowo.pdfIn PDF document text
- https://s3.amazonaws.com/sedimeraxufi/achilles_tendonitis_home_treatment.pdfIn PDF document text
- https://s3.amazonaws.com/tutapaxi/etiologi_asbestosis.pdfIn PDF document text
- https://s3.amazonaws.com/bizamesuwepe/16774742493.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/3975/0809/files/traffic_rider_game_download_mod_apk.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0488/4080/2469/files/fafegerobuzolepif.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/5950/1464/files/basketball_shirt_ideas_for_best_friend.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0503/0743/2631/files/savomesoradenaf.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9737/5388/files/76021564292.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files/surah_yasin_quran.pdfIn PDF document text
- https://s3.amazonaws.com/zuxadol/battle_rope_workouts.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_off0000731c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x731C	5052 bytes
SHA-256: `4b176405d0ddf7c0475fe5e5ac475ac6069f5e6ff9b3fde29ffb323b43abc182`
`font_01_sfnt_off00008450.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8450	10292 bytes
SHA-256: `74c058c578b4d1c489c6773c18ef8a840d8ddfcc873bda1fe073c5838b54b642`
`font_02_sfnt_off0000a790.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA790	16292 bytes
SHA-256: `48764e87c02b9a84c146af116970153065bad6898a334da5007f310d7729f136`

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