Malicious PDF — malware analysis report

Static analysis result for SHA-256 7588bccd9955188b…

MALICIOUS

PDF

71.6 KB Created: 2020-11-13 07:43:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 19e6b51066d641d60e27e6affc8d87c9 SHA-1: edc8acace060540506f99979655f8f2276db5924 SHA-256: 7588bccd9955188bfda9f324fa911d1fa8d544b31fd6be07f6ed54799936f194
204 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple embedded URLs, with a critical heuristic identifying a redirector link to 'traffking.ru'. This indicates the document is designed to lure users to malicious infrastructure. The presence of a callback lure heuristic suggests a potential phishing or tech-support scam pretext. While no scripts were explicitly extracted, the PDF structure and URL redirection strongly suggest an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://traffking.ru/aws?utm_term=blaster+master+zero+2+guide In PDF document text
    • https://fikazimibugexu.weebly.com/uploads/1/3/4/5/134515259/wasafube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450242/normal_5fadddaf40dbf.pdfIn PDF document text
    • https://jimazakogise.weebly.com/uploads/1/3/4/6/134612968/tajamib_vimimusataper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373264/normal_5f8b242189b4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376358/normal_5f92a9e54c626.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_5f884690513f1.pdfIn PDF document text
    • https://zazivepug.weebly.com/uploads/1/3/4/3/134359823/5999154.pdfIn PDF document text
    • https://gosupafitowiru.weebly.com/uploads/1/3/4/6/134673249/feseku-zoxupejijubezo.pdfIn PDF document text
    • https://xedusajid.weebly.com/uploads/1/3/4/4/134444225/lobumewotobaz_fiwemonelubut_nopituxuxej.pdfIn PDF document text
    • https://gotitodurafa.weebly.com/uploads/1/3/4/3/134351762/xepomam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mamibis/balloons_over_broadway_book_read_aloud.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/binary_ionic_compounds_list.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/geometry_unit_8_test_study_guide_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/patagonia_snow_pants_3t.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/amazon_echo_dot_user_manual.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_off0000cd7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7E 2964 bytes
SHA-256: 962e513da2ced2288d1af7618b647b57ca051328f6a435fa7882946b0d411d05
font_01_sfnt_off0000d803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD803 5376 bytes
SHA-256: 1ea65dd5ffb12063b3a41e943f83d6887b29dc6d41c90201dd9f4353422a8acc
font_02_sfnt_off0000ea3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3D 10896 bytes
SHA-256: 163e33b9a43ffa3e36cbbc8e26ee431341087a7896e08593b0d1389ca30dd38a

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