Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e4334657971c12…

MALICIOUS

PDF

79.9 KB Created: 2020-11-22 21:23:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a0c7334b974695f97276d29ca1c84eef SHA-1: e3180930d35897e17eaa782db09db796c4ca5e99 SHA-256: a1e4334657971c12d69c2734432ae1d53150bd32dfe904677af0908bf0c8963d
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, designed to obscure the true destination. The embedded URL and document body, though heavily obfuscated, suggest a lure for free movie access. The primary malicious URL identified is https://gettraff.ru/123?utm_term=shutter+island+online+free+movie, which is linked to a redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=shutter+island+online+free+movie In PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/6a802eed2366b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383688/normal_5f8f20e5276f2.pdfIn PDF document text
    • https://dubitofux.weebly.com/uploads/1/3/4/4/134458445/ziwejejaxenuwi_xubapam_pozodekokuvasu_mejipodapubi.pdfIn PDF document text
    • https://kisotupojez.weebly.com/uploads/1/3/4/4/134493444/woxivi.pdfIn PDF document text
    • https://leketupafap.weebly.com/uploads/1/3/4/5/134527175/nedepana_ropexuwivasilar.pdfIn PDF document text
    • https://benaputilog.weebly.com/uploads/1/3/4/7/134707665/1772441.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/6497588.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://s3.amazonaws.com/zidosozawok/bomanofowudelekaf.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/ace_banking_and_static_awareness_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/ww_friscoisd_org.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/40411792805.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/24263109691.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/72879560408.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/wisulatikuxat.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_off0000edae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAE 5192 bytes
SHA-256: 0298d384e07ba1274fdd816fa1f92144697da5bcc3dc849e4bad5e74f5e1e398
font_01_sfnt_off0000ff26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF26 11028 bytes
SHA-256: c20e3da18a0fd8ca0c560644cd4433d5a12f6badf1b9b03ff3e5eec51095ab5c
font_02_sfnt_off0001245e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245E 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230