Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d983fe2d1acdc96…

MALICIOUS

PDF

70.1 KB Created: 2020-12-21 13:46:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b55abbdd8ee11d44214a4e921446a799 SHA-1: 23fdea56ba75cfff306ca8661417946ec7ee1a57 SHA-256: 2d983fe2d1acdc9655363be04509d2e0d4626282116b9f360f35e7715e48b662
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru', and another for a PDF link farm. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of numerous embedded URLs, including one identified as a malicious redirector, suggests the primary goal is to redirect the user to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://ggtraff.ru/strik?utm_term=space.+io+crazy+games In PDF document text
    • https://static.s123-cdn-static.com/uploads/4456378/normal_5fc3fba01ab37.pdfIn PDF document text
    • https://wefigofotagovir.weebly.com/uploads/1/3/4/8/134864379/83399cbf.pdfIn PDF document text
    • https://jobubati.weebly.com/uploads/1/3/1/4/131453688/xaxeka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392215/normal_5f9395a6ae463.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/zubuwujoxom/43819128073.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/kubevabasogefima.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/44804670170.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/xozitivifaletegutim.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/82881184993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6c9f0aa-9b1e-44a9-b9c9-434e83de21d6/68112903311.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/dead_by_daylight_free_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/chrome_themes_free_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/7718374668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7798922c-2dc8-41e5-96b5-609e406247c7/40646264703.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/38966759277.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/ark_survival_evolved_apk_data_mod.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_off0000d529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD529 5508 bytes
SHA-256: 2498bc3ac2f30028b278a98cf592eec18408149ae0271a252eeebe28f1b8f698
font_01_sfnt_off0000e7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E4 10372 bytes
SHA-256: dbdaf79102b42d936f7bbfcb977e339c6627fa9d36d7280fac48a55b57ad2d05

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