Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd7eb20bd7e861e…

MALICIOUS

PDF

42.4 KB Created: 2020-10-15 01:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1d0eb4d506965772c5d3dfed70f0647b SHA-1: 59d9602a9d6c5ab5f8b8c172926fc89ccbbe93b3 SHA-256: fdd7eb20bd7e861ed6c74a7edd347646d4d2e19bebb03750896b1b1aa03b561d
124 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to external URLs, one of which is identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for downloading a game, which is consistent with phishing or malware distribution tactics. The presence of multiple embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content.

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 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?keyword=download+apk+game+piano+tiles+2+mod In PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/b701293be7ca.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/jojul.pdfIn PDF document text
    • https://pobezewimo.weebly.com/uploads/1/3/2/6/132681951/3ee3d4d442.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3355978.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f875a4d5767e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f877e3384b64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f87742a62044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f877e5ea4869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f86fa29d596a.pdfIn PDF document text
    • https://site-1037227.mozfiles.com/files/1037227/89856250220.pdfIn PDF document text
    • https://site-1040097.mozfiles.com/files/1040097/52203942607.pdfIn PDF document text
    • https://site-1041852.mozfiles.com/files/1041852/medopoporevixuduku.pdfIn PDF document text
    • https://site-1040881.mozfiles.com/files/1040881/tijisugofamozexidaruva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9614/6073/files/modawefarilojigovop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7927/3115/files/drawboard_pro_features.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6489/3855/files/dulelurogugon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34cdd7a2-830b-4e83-be89-a61394ce3572/22084699667.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e67a926f-289b-4a65-8776-8a842ba49114/58617536313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c46908d-cdca-4511-87fb-d0c2ad0466c5/65233511554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de63a309-0398-4634-8f82-a4c7dcbfad52/gufumunaredetafos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e576c17-253b-4860-acfb-1965367994cb/45741992722.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_off00006768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6768 5472 bytes
SHA-256: 256ba9c7d627be81002ad5eb9062e9aa4ecc7dac0aa905790a897f14fc077309
font_01_sfnt_off00007a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A11 10052 bytes
SHA-256: 65569382256c2d53b4f575223a57a54199e3258b7a040b116912fac7f07679b3

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