Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a510d9e07b077a9…

MALICIOUS

PDF

42.3 KB Created: 2020-08-21 13:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0af1c2b1766a0551c4303b850c4c3c92 SHA-1: d178c67d6684b7a9cd190fd78e5dbde79067ca40 SHA-256: 7a510d9e07b077a9fac3ce2a0f580ed61e879d29a74d041f6a9d8164e6409889
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that directs to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many pointing to PDF files, suggesting an attempt to manipulate search engine results or distribute content. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this file.

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=habib+adm+limited+annual+report+2014
    • http://files.pmcpaintingscom.com/uploads/1/3/0/7/130776204/degupor.pdf
    • http://files.jamestanksley.com/uploads/1/3/0/7/130776575/zovuneta.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/womikitizu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/rivikofaxuzikosezafo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0216/6435/files/vutukevomulafudiz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/vurujavuneju.pdf
    • https://cdn.shopify.com/s/files/1/0432/3436/1503/files/wureridopilekiri.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/vadimijuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3567/files/calendario_serie_b_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0436/7591/0294/files/site_reliability_engineering_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2962/files/98866787639.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_off000057e3.bin
9ad33050fc1674899d4410564f0722a7ece43e962b757ad78c633a64fae088c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x57E3 5440 bytes
font_01_sfnt_off00006a4c.bin
473654a8085755cb89c4abfc60defe46b1cb24f447d5b05662999bbd95fe2d82
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4C 15608 bytes