Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc6f424ba13f4d8…

MALICIOUS

PDF

52.1 KB Created: 2020-08-11 18:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3128dd773b351b92d98d6d7d80c75c6 SHA-1: f264eff7bdfe6db7afd412c490390d0f16bfce45 SHA-256: 3dc6f424ba13f4d8d7b46743c2d97f316a6e9a3c9f5dc7fbba1a0dca093d7a8a
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, suggesting the document's primary purpose is to trick users into visiting this malicious site. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=speaking+english+learning+pdf
    • http://files.radiantspirittransformations.com/uploads/1/3/1/8/131856212/6971259.pdf
    • http://files.apalacheefootball.org/uploads/1/3/1/8/131856353/1938002.pdf
    • http://files.onyxfuneralplanning.com/uploads/1/3/1/3/131380413/pofadajigivep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/7037/4559/files/bodekamagarabiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/list_of_regions_and_provinces_in_the_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/essential_biology_textbook_for_secondary_school.pdf
    • https://cdn.shopify.com/s/files/1/0430/8120/3861/files/gafoko.pdf
    • https://cdn.shopify.com/s/files/1/0440/5523/2677/files/anatomy_of_the_eyeball.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/73630502766.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/pig_latin_converter.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/46141058003.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/ds2_titanite_chunk.pdf
    • https://cdn.shopify.com/s/files/1/0434/1946/7943/files/pdf_file_reader_app_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0434/9617/7816/files/supplied_pdx_fake.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/
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/essential_biology_textbook_for_secondary_s

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d28.bin
411a4b3ba93c0e8658e0e7dfdefc91354a3a9c23e404b52466c60d5096cf108e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D28 5472 bytes
font_01_sfnt_off00009fb2.bin
c18d5a1a64fab9741522599e0e65bc0c1e75c507fa996c8708fea8f32b8e7366
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB2 10468 bytes