Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ef004bff9b4eca…

MALICIOUS

PDF

46.1 KB Created: 2020-10-28 14:51:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 00d6a13599b18a6fa7fc9debd7c3bcab SHA-1: 6785672ef625102cdc766db529e41fef5f022739 SHA-256: 49ef004bff9b4eca7abd20537a7e13b9777877905d0cd142ab4abb60cba07e18
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to disposable hosting or known redirectors. One URL, https://gettraff.ru/aws?keyword=google+sheets+statistics, is flagged as a malicious redirector. The document's primary function appears to be to drive traffic to these external sites, likely for malicious purposes such as phishing or malware distribution.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?keyword=google+sheets+statistics In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f8ab3cc55ac1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f875dc9e196f.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/fapiraxorewisel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f929889b7818.pdfIn PDF document text
    • https://sitawixabebel.weebly.com/uploads/1/3/4/3/134319036/3624137.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/4119082.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/cbc5c3f7.pdfIn PDF document text
    • https://vefigemeg.weebly.com/uploads/1/3/4/3/134368147/3696735.pdfIn PDF document text
    • https://sakeneri.weebly.com/uploads/1/3/4/3/134339958/jirunajolerome.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/tamegonufugak.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/009f6df5f7df7.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/bfcdc591-b1a1-456f-826f-128e40a2c456/miwevemagisasixomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14456e6f-74a4-424b-9a5e-5fbf2a172296/29703584067.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64c034ff-75a1-438b-b8fa-faa9322ee3b2/22723839234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9756e413-080d-42fe-bf7f-1499b12d7d5f/xovopowexuporaluzepofude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e0dfc6f-3b99-4f2f-a191-d8634ef635b0/329730538.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/server_power_supply.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d63c9b9c-bde9-442b-a110-1d671183107c/74534591083.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05afb430-cf9a-44d2-a0e2-71f205aeebbf/63545025214.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/7129497208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c5f0ae-4fc3-4271-8136-b06ec44d59f4/wevaxatosavakamizibito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5509c627-71c7-491b-a26f-eac44c56a5e5/69863952779.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/adverbs_of_time.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/business_communication_full_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/colinrgicos_y_anticolinrgicos.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7639 4996 bytes
SHA-256: 867256389b9de3721b8893b0aa046781ac7d2bb84501ab2da4fc5fdb3c4c8892
font_01_sfnt_off00008741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8741 10360 bytes
SHA-256: 7391542bb18f63f9587932a57774b7f8327c90f1e123e2c5d1254dac89ced045