Malicious PDF — malware analysis report

Static analysis result for SHA-256 d197a5dab7b569e0…

MALICIOUS

PDF

78.0 KB Created: 2021-01-06 13:50:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 97effbdc8f86d22806cd9bc7cdf8852f SHA-1: d7438bee8cdf83dd2786fc83a62990c511e37413 SHA-256: d197a5dab7b569e039f5d3ab3901385fc19f317ffde9fcb99155dd3d000b7b0d
304 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file is identified as malicious by multiple heuristics, including a critical finding for a brand-impersonation credential phishing lure impersonating Netflix. It contains a mass of external PDF links, many hosted on disposable domains, directing users to redirector infrastructure. The primary malicious link identified is https://gettraff.ru/123?utm_term=watch+office+space+online+reddit, which is part of a link farm designed to lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://webenimuto.weebly.com/uploads/1/3/4/8/134846763/9679777.pdf.
  • 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/123?utm_term=watch+office+space+online+reddit In PDF document text
    • https://webenimuto.weebly.com/uploads/1/3/4/8/134846763/9679777.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/tlf4hjf/browser_mining_free_bitcoin.pdfIn PDF document text
    • https://pezimanazeto.weebly.com/uploads/1/3/5/3/135309923/829910.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501208/normal_5fc9528cd774e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f9ed1c0beb8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f881502c3fd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5f8758b34696b.pdfIn PDF document text
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/995d3830.pdfIn PDF document text
    • https://gifiboluf.weebly.com/uploads/1/3/2/6/132681188/ffc5301.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/hjeghjc/gun_ops_anti_terrorism_commando_shooter_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408479/normal_5fa2ac1debaf5.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://uploads.strikinglycdn.com/files/6380402c-70cf-47da-8255-31096a5607d5/zebiselimasidineja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b06fa58-57d4-4455-be86-5f6315f6e0ce/99836514277.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/boruto_36_manga.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/display_action_sheet_swift.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.

FilenameKindSourceSize
font_00_sfnt_off0000e668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE668 5044 bytes
SHA-256: 8772beb8fc05e5f4bb60c23c7e8c18360a7e2a66cb07808fbb5a4445e5d842e7
font_01_sfnt_off0000f783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF783 10916 bytes
SHA-256: 7240571fa2910b53a820557dfe5b4a37492a22211466d5f948da4a6b1b9626cc
font_02_sfnt_off00011ced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CED 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71