Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ff012ab6bc3ef9…

MALICIOUS

PDF

48.5 KB Created: 2020-11-09 13:00:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 15b9279d4913a6b7df930c94b556f633 SHA-1: 712bb69987aaf9394f7d1f6115d5e77a83600a4f SHA-256: 68ff012ab6bc3ef9871f9cdacf8ed5bf2d0435d0dc4a775de41c2c6361d51bcb
114 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 'https://cctraff.ru/aws?keyword=centrifugal+force+examples+ap+human+geography'. Additionally, a callback phishing lure heuristic suggests the document is designed to trick users into contacting a malicious entity. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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.
  • 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) 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://cctraff.ru/aws?keyword=centrifugal+force+examples+ap+human+geography In PDF document text
    • https://jawiniralegewo.weebly.com/uploads/1/3/4/4/134492986/bajizupaxed_dasupew_fegazafokoluzo.pdfIn PDF document text
    • https://razulusajo.weebly.com/uploads/1/3/4/4/134467314/1951329.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/7282895.pdfIn PDF document text
    • https://refaxezadale.weebly.com/uploads/1/3/4/3/134325555/matigezato.pdfIn PDF document text
    • https://losepubi.weebly.com/uploads/1/3/4/5/134502138/ragos_dinetiwoga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca2ba5fc-63fe-4bdf-860f-126b68780f62/xesikejifupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1fb08f4-a014-4eda-8377-cb87b0cb0d58/sittin_on_the_dock_of_the_bay_vocal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d8b4a42-5a32-4c24-b41d-d02963d63386/sukadivutozefudakupon.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/core_critical_thinking_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fed9f01-fdb5-4244-804d-bbb5e727d601/jefitonudekuvosemoluf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b25371c-753d-46ae-a7d0-8298adf28c8a/wofijarowebatebeweku.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/busetevo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1C 5504 bytes
SHA-256: 977048e5d6c29182b90328217fc0249bc2698f81df77ff92c36d6d942fd17845
font_01_sfnt_off000070b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70B4 2212 bytes
SHA-256: b46b845eeebf342888160e446f93ba433a309431cbe71a6b97273c5237a38f65
font_02_sfnt_off00007acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACD 10224 bytes
SHA-256: 36f2cf4704cca0416456201e1ec0baa15d802caa5cfddf0712df0fb3360f9650
font_03_sfnt_off00009e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E05 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f

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