Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a68342f458f6398…

MALICIOUS

PDF

55.6 KB Created: 2020-08-05 05:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0886ae3b478123672abdcd48fd74f41 SHA-1: 328aff229a50752d53a64f007c529ae20299c6d4 SHA-256: 0a68342f458f63982780f63ae219c15bf7957b5f21162df795266bdf939990c4
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to host numerous PDF files. This suggests a campaign to distribute malicious content or phishing pages.

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.cc/pify?keyword=tabla+de+pruebas+bioquimicas+para+enterobacterias+pdf
    • http://files.evictory108.com/uploads/1/3/2/6/132695258/bupamigoxeriju.pdf
    • http://files.knightoncommunitycentre.com/uploads/1/3/0/7/130775672/fakimasa-wuxepet-ruxese-ropifopekejevo.pdf
    • http://files.native-beef.co.uk/uploads/1/3/1/8/131856195/34bcfb8a960be.pdf
    • http://files.drfujinaka.com/uploads/1/3/1/4/131407424/ed9eb6b8.pdf
    • http://files.miriammccormick.com/uploads/1/3/2/8/132815882/d870ae05d1a5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bugos.pdf
    • https://cdn.shopify.com/s/files/1/0450/4177/8838/files/shrink_high_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/64658078535.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/xuvuzivo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/rowikekixaxuzujovudenuwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9879/1322/files/fogewifakugobipefej.pdf
    • https://cdn.shopify.com/s/files/1/0439/1718/1083/files/embed_in_google_doc.pdf
    • https://cdn.shopify.com/s/files/1/0438/7949/7896/files/87461928403.pdf
    • https://cdn.shopify.com/s/files/1/0427/7826/3718/files/dolphin_emulator_xbox_360_controller_profile.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_off0000975a.bin
d2f19856b518293a4337658413c14bf20487ef0c64b22837ab1ecaa87dcc2870
pdf-font-stream PDF embedded font (sfnt) at offset 0x975A 5516 bytes
font_01_sfnt_off0000a9ff.bin
4c62137a04698a09846165753d11b62dd0769b6e67f21752bffd2d53491e0bb0
pdf-font-stream PDF embedded font (sfnt) at offset 0xA9FF 11656 bytes