Malicious PDF — malware analysis report

Static analysis result for SHA-256 1391aeb688518a16…

MALICIOUS

PDF

47.9 KB Created: 2020-10-10 20:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b5fccd2adff3b16a36ad22e0c5ce4265 SHA-1: 76503c04efce641b501d9f586b8a8d678e6a2f11 SHA-256: 1391aeb688518a1628fcc53abac5c59574e73a61c4ab5392c03e26a88d0ed2a2
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is further supported by a high-confidence ML classification. The document body, though obfuscated, contains text related to a modem manual and the malicious URL, suggesting a social engineering lure. The embedded URL is designed to redirect the user to potentially harmful content.

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.link/pify?keyword=manual+technicolor+tc8305c+izzi In PDF document text
    • https://site-1036971.mozfiles.com/files/1036971/43952228017.pdfIn PDF document text
    • https://site-1039279.mozfiles.com/files/1039279/49711436361.pdfIn PDF document text
    • https://site-1040325.mozfiles.com/files/1040325/lomajegigewojatadaseni.pdfIn PDF document text
    • http://files.rajahmaples.com/uploads/1/3/0/7/130775841/binudujof_kovajeg_kikutura.pdfIn PDF document text
    • http://majitele.twelfthhousereadings.com/uploads/1/3/0/7/130738591/damemo.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/ce68babb-7a60-406d-9bc5-cf24f28e605c/vuwexedaxexalisalukabidiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc73f233-fd8f-4ca3-898f-e458dae1bb66/62893522823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca2bbda1-5b6e-469f-a660-37136b62257d/jodotunabuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7609/1045/files/stronghold_of_security_walkthrough.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6068/6748/files/53371267158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7242/5636/files/misokenavufujejigodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3934/1216/files/best_rope_for_bondage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7791/7079/files/mipawojuxotirilo.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off00006ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE0 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off00007ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD4 5388 bytes
SHA-256: f7405340042e5b70935ab2bb328253d3fb80ce6f1da52432a93d0d9ee82ee8a6
font_02_sfnt_off00008d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D29 10796 bytes
SHA-256: daf7a67a0ade22372a4bf629da91ff5f303433d6941bca0cbf5924912c38de56

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