Malicious PDF — malware analysis report

Static analysis result for SHA-256 05f4884a2500e4d8…

MALICIOUS

PDF

40.1 KB Created: 2020-08-25 19:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: daab74715c98f578b34bca08901a9848 SHA-1: e260b7042855e2de4d86ee7301569e376ae11c59 SHA-256: 05f4884a2500e4d822771b0dc672bf20659be97c92ae32886216f7a4a6eb50f4
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The ML classifier also flagged this PDF as malicious. The embedded links likely serve to manipulate search engine results or lead users to malicious content, potentially as part of a phishing campaign.

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://ttraff.ru/pify?keyword=caps+lock+minimizes+overwatch
    • http://tulalo.ismaakarate.co.uk/uploads/1/3/1/1/131163559/3890704.pdf
    • http://lodosax.mismacounsellingservice.com/uploads/1/3/0/8/130813055/2640119.pdf
    • http://files.elawithmsionut.com/uploads/1/3/0/7/130738876/ab3b33f76d2.pdf
    • http://files.dedosdoamerica.com/uploads/1/3/1/0/131070792/guzan-ligaledakuf-sugegiwaxemude-wukalemub.pdf
    • http://nuzodamo.williamsremodeling.com/uploads/1/3/1/4/131482975/jagovuwodes-ledos-wogerovupo-gizagasekusogak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/ramuda.pdf
    • https://cdn.shopify.com/s/files/1/0431/9890/6528/files/38776036945.pdf
    • https://cdn.shopify.com/s/files/1/0437/1405/2247/files/beyond_the_aquila_rift_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/oxford_maths_book_for_class_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/4475/6901/files/duwekogipisuwopitagoruz.pdf
    • https://cdn.shopify.com/s/files/1/0437/1143/0809/files/ex_mannan_miracle_crack_2._58.pdf
    • https://cdn.shopify.com/s/files/1/0435/4270/8378/files/asme_y14._5m-_1994.pdf
    • https://cdn.shopify.com/s/files/1/0432/2852/8799/files/bubefojil.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/18912868852.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ee1.bin
2506c12081448fa99000859559fe58202a938e09c87aa8e689c22fa878fe55b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE1 5344 bytes
font_01_sfnt_off000070fc.bin
0e588f08b57ea5f5ec3c74e542b7460133c40b6bcbaa7999c3ec32dc0dff8014
pdf-font-stream PDF embedded font (sfnt) at offset 0x70FC 10224 bytes