Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94e8e16eeabd436…

MALICIOUS

PDF

45.4 KB Created: 2020-11-08 14:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 442dc0f38e389438c8be54b12a6ea028 SHA-1: d6bded729f725249ec6d587b758e8f5194ad5f5f SHA-256: d94e8e16eeabd436ca1c0d754d9a66a51ea826a86462b4544174025f306de645
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the one identified by the redirector heuristic. The presence of a link farm suggests an attempt to distribute traffic or SEO manipulation, likely leading to a malicious payload or phishing site.

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.
  • 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://traffmen.ru/123?keyword=anker+79an7917+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420902/normal_5fa796295d2e2.pdfIn PDF document text
    • https://tusezewepoxir.weebly.com/uploads/1/3/4/3/134339989/migufiwek.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/lalatim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421207/normal_5f9670c0324bd.pdfIn PDF document text
    • https://nifosigi.weebly.com/uploads/1/3/4/4/134488788/nozoburasagofofu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sugosubexez/vefozegenewi.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/c_programming_algorithms_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/vetupavax.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/pdf_to_word_editable_converter_free_download_full_version.pdfIn PDF document text
    • https://petivubeso.files.wordpress.com/2020/11/fimodikoxelebasipitimo.pdfIn PDF document text
    • https://bebivix.files.wordpress.com/2020/11/silezo.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/gorumevifosasapuruz.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/outlook_365_com_sign_in.pdfIn PDF document text
    • https://wobonil.files.wordpress.com/2020/11/genezirifimonazukafize.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C64 4640 bytes
SHA-256: 7baae778272696522434b8324fb2007257e1c8b3a7db3cc691a4259664846e86
font_01_sfnt_off00006c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C07 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00007494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7494 11300 bytes
SHA-256: 86d1c3983474a854b547ce594b69abe0e88f765b62d95ee3db5449a96cb721c0
font_03_sfnt_off00009a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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