Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db8cd4eb75cc2ef…

MALICIOUS

PDF

43.2 KB Created: 2020-11-03 16:30:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 315c15f310261564b6cb9abc897dbda3 SHA-1: 4bc1bced019603ef0470607f8d36be18e3cd4ee6 SHA-256: 0db8cd4eb75cc2ef39733318f33c6af3506c02329de24d226fadc0ca38fff9ef
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/123?keyword=free+zentangle+patterns+pdf'. This URL is embedded within the document's body, suggesting a social engineering lure to trick users into visiting a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ttraff.cc/123?keyword=free+zentangle+patterns+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415080/normal_5f9fbed7841d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f95f2137c89d.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/7ecf64b0ccb27b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f927cbc3bf3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384459/normal_5f919b087612d.pdfIn PDF document text
    • https://gokipeko.weebly.com/uploads/1/3/4/3/134351508/3466460.pdfIn PDF document text
    • https://jikajulimag.weebly.com/uploads/1/3/4/3/134319013/nimavepiz_wemoviwuvakig_gikujufolizugip_xifisifemodetum.pdfIn PDF document text
    • https://juliraviwuziw.weebly.com/uploads/1/3/4/2/134267057/tobokuzuz_kunivorine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385869/normal_5f90f51b9b5aa.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/mukut/vetepumaxug.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/gomevekewejojuzebirurar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad164224-29eb-4647-9b04-ada4ea3630b4/91228025208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b5191a7-3913-40a2-90d2-b04b41fa1762/vozakosesogubidizovu.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_off00006bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBC 5212 bytes
SHA-256: 30ac670aa05028ffb76c3417de4241a3ba69059c57262b1bac01f700446b7d83
font_01_sfnt_off00007d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D92 10196 bytes
SHA-256: 354f0e5135f38801255d645134b439cf6d816976fbfdb929a12b368ea25db90f