Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5b33a6b7ccae419…

MALICIOUS

PDF

184.4 KB Created: 2020-10-31 13:03:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 072266093f9d1b531cbdcf24d93107d4 SHA-1: b056519e9bb80369d600765cd729f6e951b218b6 SHA-256: a5b33a6b7ccae41908a8a6355df8c2a21bdc6c4e6f8c00e9a4e84929e0b1e56a
94 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. The embedded URL `https://gettraff.ru/aws?keyword=the+farmer+refuted+by+alexander+hamilton` is the primary indicator of malicious intent, suggesting a phishing or malware distribution lure. No scripts were extracted, but the presence of the malicious URL strongly suggests a malicious document.

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://gettraff.ru/aws?keyword=the+farmer+refuted+by+alexander+hamilton In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5f90081a6282a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370080/normal_5f8fdcdc5f1e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379053/normal_5f8bb5b935ef4.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/1/0486/4475/1528/files/12628581452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/579cc5b8-5d3a-4d5b-bf95-92fdc64cc1b2/zabano.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/tuluxovasetemunudedokumi.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/zizinemixovaz.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/1944678361.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/citroen_c3_2018_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/weed_eater_lawn_mower_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c4b180e-6a89-4325-bdda-68d7f862148c/9086474915.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/tisiwalonib.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/add_picture_to_free.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_off00029c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29C11 5228 bytes
SHA-256: d3c9463655cc30e431ac1e251a1caf9aa9485c0834eb0f0610bc259e21d3b289
font_01_sfnt_off0002adb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ADB9 11072 bytes
SHA-256: 316ee3eac48786c1dbc794640cf052f6eb12acbcc9c2c96fc7b4e141c49407a0