Malicious PDF — malware analysis report

Static analysis result for SHA-256 656247a6445a1534…

MALICIOUS

PDF

33.4 KB Created: 2020-08-13 22:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c60404756295b16b74d46c3926d2da97 SHA-1: e92d7faa5596e35a621414fdb94ecde2f3fadfc3 SHA-256: 656247a6445a15342503016b8c58fa382d0ee7a81a03263d9d63ce196234d0e4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of the primary links, https://ttraff.ru/pify?keyword=ardaas+punjabi+movie++mp4, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the movie 'Ardaas punjabi movie mp4', suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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=ardaas+punjabi+movie++mp4
    • http://files.robertjamesallison.com/uploads/1/3/1/4/131437982/reduzijejap-lenasezolarijit-defoje-roriruge.pdf
    • http://sitefinuk.proplumbingmesa.com/uploads/1/3/1/6/131636725/7a938.pdf
    • http://files.kvag.net/uploads/1/3/2/6/132682976/wutajinu.pdf
    • http://files.burmenlawgroup.com/uploads/1/3/0/9/130969939/lusano-resatonakugav-direfuz-tujipepaz.pdf
    • http://files.delawaremusic.net/uploads/1/3/0/8/130813985/cd32ad34.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3350/9535/files/wizebu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2111/files/surevawufujufasejub.pdf
    • https://cdn.shopify.com/s/files/1/0438/6642/3456/files/tizerupugatuxexupogu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6624/2710/files/68667525320.pdf
    • https://cdn.shopify.com/s/files/1/0432/4301/2256/files/agile_methodology.pdf
    • https://cdn.shopify.com/s/files/1/0437/2017/9864/files/11914531310.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/transportation_worksheet_preschool.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/complete_key_for_schools_workbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0445/6854/3396/files/linux_commands_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/79441135948.pdf
    • https://cdn.shopify.com/s/files/1/0439/3769/3851/files/java_word_to.pdf
    • https://cdn.shopify.com/s/files/1/0438/3450/7426/files/pijoguxadupejarowatizumu.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_off000045f2.bin
64bb839e061cfdc1f22b636dc99735d281f91719f7741af5d0d8cdb4885d3529		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45F2 5428 bytes
font_01_sfnt_off00005853.bin
0aaba4a1cd069a4639881e51b0028480e13d30f71aa11a1d7ec4f6d574aee735		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5853 9468 bytes

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