Malicious PDF — malware analysis report

Static analysis result for SHA-256 b294f3e703373572…

MALICIOUS

PDF

46.4 KB Created: 2020-08-24 20:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a1d56bee6825756942efbab62a571bf SHA-1: b2eb11b33fa75172e128bbb5ebdb445db4f7855b SHA-256: b294f3e703373572afbc2d4940d411a0171a5ab589f97b2ff975bb9be960e75b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'Los Angeles county recorder's office forms' and a URL that appears to be part of a link farm designed for SEO manipulation, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of the file. The primary attack vector appears to be social engineering through a deceptive link.

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=los+angeles+county+recorder%2527+s+office+forms
    • http://files.davisbaybc.com/uploads/1/3/2/3/132303238/6470603.pdf
    • http://files.kut-snake.com/uploads/1/3/1/4/131453724/xobomenukokapa.pdf
    • https://cdn.shopify.com/s/files/1/0434/8179/2664/files/jegejuzedow.pdf
    • https://cdn.shopify.com/s/files/1/0439/2160/4763/files/apache_file_timeout.pdf
    • https://cdn.shopify.com/s/files/1/0432/0005/3408/files/23870588240.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0619/files/denojezexire.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6826/files/likejeruribulupigaza.pdf
    • https://cdn.shopify.com/s/files/1/0429/7873/8335/files/birorepesinogifewituv.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/nuloxunigafewenitazik.pdf
    • https://cdn.shopify.com/s/files/1/0429/5357/2515/files/78600141722.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/56838497074.pdf
    • https://cdn.shopify.com/s/files/1/0437/3469/6097/files/cambridge_igcse_business_studies_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/4954/2041/files/58541333815.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/ashcroft_gauge_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9652/files/bopirutejiritakot.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/46717056091.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006852.bin
90a9ba308ff233fe41c07254e826860c098f596939d52e2716f26599b1933155		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6852 5416 bytes
font_01_sfnt_off00007abc.bin
b6f1abd01ab8d542b851e85a830915bc36310556ab150a75bbc969efe7dae4a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABC 15980 bytes

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