Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5873fb0dc7077d…

MALICIOUS

PDF

47.6 KB Created: 2020-08-05 10:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a44cdfab81b0fdf2c6c53d1cdb2f41b SHA-1: a8dc23b3ed8d7c331ecfe34be3144360c7deed19 SHA-256: 0e5873fb0dc7077d63706b1c66f0821f24547f666be2279974b51964bf89f338
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating an attempt to distribute malicious content. The embedded URL and document body text explicitly mention 'biology ebook pdf free download' and include a URL that redirects to known malicious infrastructure. While no scripts were extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attempt to a malicious 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://ttraff.ru/pify?keyword=biology+ebook+pdf+free+download
    • http://files.plainonpaper.com/uploads/1/3/1/3/131383720/tobape-jibokitemas-xovasivun.pdf
    • http://files.bikerstoreuk.com/uploads/1/3/1/3/131379014/1100317.pdf
    • http://nepebesu.jackiecheuvront.com/uploads/1/3/1/4/131437615/4268760.pdf
    • http://files.vanesanieri.com/uploads/1/3/2/8/132814468/1946143.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pekazojifedabefotekufof.pdf
    • https://cdn.shopify.com/s/files/1/0438/1097/9997/files/21069703881.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8918/files/nakalinobinutaxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9724/4316/files/12786014539.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5050/files/you_ve_been_booed_sign.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/xosov.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/18619912937.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/72884902439.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/90374672753.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/33952400197.pdf
    • https://cdn.shopify.com/s/files/1/0434/0989/9670/files/japuroni.pdf
    • https://cdn.shopify.com/s/files/1/0430/2202/4867/files/97476234748.pdf
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/nexagorabomukolefoleg.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fae.bin
dd329c6f938e9f2d0ecbcc61fa30d5f7348d75d2da00debae6023c8a6ce0d743		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAE 5188 bytes
font_01_sfnt_off00008169.bin
9a625e1856c47829895b8576202a68514c18b8894edd566f0f7a07dd15cf475f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8169 10004 bytes
font_02_sfnt_off0000a372.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA372 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.