Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02bcaaeb069101a…

MALICIOUS

PDF

40.9 KB Created: 2020-08-13 21:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd015ba5f95544e1bc77644ea54657da SHA-1: dea58c91f70c9ddb539916d14c15d94fa5b695d1 SHA-256: b02bcaaeb069101ac8c0be8baab3438d41426813e0287a5e7f2b79121c435b50
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it features a PDF link farm hosted on Shopify, with one of the links also present in the document body. The ML classifier strongly indicated maliciousness. The primary attack vector appears to be luring the user to a malicious site via 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.com/pify?keyword=yorkshire+post+crime+reporter
    • http://files.adambagleyillustration.com/uploads/1/3/1/3/131379340/zoruw.pdf
    • http://files.leafytea.co.uk/uploads/1/3/0/7/130776408/e082cbe8c4b96ba.pdf
    • http://files.designmoulding.org/uploads/1/3/0/7/130775085/sujulixu.pdf
    • https://cdn.shopify.com/s/files/1/0448/2321/6285/files/60351933850.pdf
    • https://cdn.shopify.com/s/files/1/0430/6078/9409/files/padozafivilowukisidone.pdf
    • https://cdn.shopify.com/s/files/1/0430/5541/5445/files/42025263215.pdf
    • https://cdn.shopify.com/s/files/1/0439/5145/6411/files/dicionrio_jurdico_da_academia_brasileira_de_letras_jurdicas.pdf
    • https://cdn.shopify.com/s/files/1/0431/9218/9089/files/lonely_planet_moscow_and_st_petersburg.pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3767/files/optical_encoder_arduino.pdf
    • https://cdn.shopify.com/s/files/1/0447/7334/3383/files/presentation_analysis_and_interpretation_of_data_in_research.pdf
    • https://cdn.shopify.com/s/files/1/0435/1436/4059/files/34423605666.pdf
    • https://cdn.shopify.com/s/files/1/0437/8063/6821/files/how_to_print_labels_from_csv_file.pdf
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/44822217827.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/nozapifapisuwaxegililoxot.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6088/files/arabic_letters_tracing_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/0101/1614/files/27102868309.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_off00006160.bin
b029504cc7b2e608d3ccf44cf99757b66b6396aad08282e86251329aed3a4cfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6160 4956 bytes
font_01_sfnt_off0000721d.bin
a253003842b8d36ffe3fecebbe550079c9947261967950c82af6c074b0d0f68c
pdf-font-stream PDF embedded font (sfnt) at offset 0x721D 10304 bytes