Malicious PDF — malware analysis report

Static analysis result for SHA-256 084321f3789d088d…

MALICIOUS

PDF

47.7 KB Created: 2020-08-10 08:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2416562a2cc0804d1bf306d0cded7e28 SHA-1: 1f06a34e3a7b6728878b97bc016e37aa7ed7004a SHA-256: 084321f3789d088daeca48861db7cf21a348d714b4098a7ab9a6857488b8514d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, but also includes a critical link to a known malicious redirector at ttraff.ru. This suggests the document is part of a link farm or SEO manipulation scheme designed to funnel users to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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=bengali+to+english+dictionary+pdf+ebook+download
    • http://files.bluewater4property.com/uploads/1/3/1/3/131380546/tepevijowuk.pdf
    • http://files.thebonobodiaries.com/uploads/1/3/1/4/131406286/sukewuf.pdf
    • http://files.rootack.com/uploads/1/3/1/4/131452997/xeritipebev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5656/1318/files/15553352065.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3302/files/16765658560.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/filsafat_imam_al_ghazali.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/28711035187.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/rerimonebabafiwemowekige.pdf
    • https://cdn.shopify.com/s/files/1/0433/2594/8072/files/kivogisulobelezu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/pavonoje.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0476/files/feraliporoserino.pdf
    • https://cdn.shopify.com/s/files/1/0432/2282/7165/files/personal_statement_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/8472556066.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060c9.bin
98d6cae210f49fb6b9f79362d215303efb994a826f5b5f79907c257280c91799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60C9 5864 bytes
font_01_sfnt_off000074cb.bin
00b97bf026faf62e808e63cb77a483cd52ef175fbbff502513488716c072541b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74CB 3920 bytes
font_02_sfnt_off0000810a.bin
dda256e8cf4eee4298835e504eb75d49cb13ab10d1781cc6c162a507f8f0cc23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x810A 3188 bytes
font_03_sfnt_off00008e6d.bin
a3f742ca2744a1519e49e63e039044672d7246e772b566bc8b1466bb719818d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6D 10212 bytes

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