Malicious PDF — malware analysis report

Static analysis result for SHA-256 276b85b091d094e4…

MALICIOUS

PDF

44.2 KB Created: 2020-08-09 00:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 389d4aa98a2482bc24cd5f2ce8d98194 SHA-1: 9b060bbf88789d168d72dcc8610cdcbbd8b44a83 SHA-256: 276b85b091d094e48462a9cd03e51fbb0c7989444107c35a8233c571a9c69055
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body text and the malicious link heuristic indicate a lure to convert a PDF to a Word document, likely a phishing pretext. The ML classifier strongly flagged this PDF as malicious. The primary IOC is the malicious redirector URL.

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=convert+pdf+file+into+word+doc+online
    • http://pubid.highlevelhealing.com/uploads/1/3/1/3/131398560/784964.pdf
    • http://files.douglaslynnwhite.com/uploads/1/3/1/6/131606492/2c0cddd2.pdf
    • http://files.beyondshipsart.com/uploads/1/3/1/4/131453919/ludedaxibuduramu.pdf
    • http://files.rivermenrodandgunclub.com/uploads/1/3/2/3/132302973/nomegariwutok-wibiwu-visinatixubuj-sojimuta.pdf
    • http://gubogoj.gtts.eu/uploads/1/3/1/3/131380600/vusepujo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0235/6127/files/91809659805.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/papixusisijipe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4845/1739/files/pujubipalutofu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8758/4675/files/tiefling_subraces_dnd_5e.pdf
    • https://cdn.shopify.com/s/files/1/0429/7090/6780/files/dowuninesi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/91025233068.pdf
    • https://cdn.shopify.com/s/files/1/0436/6296/6937/files/73586877082.pdf
    • https://cdn.shopify.com/s/files/1/0434/5049/9222/files/zixufi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6896/4505/files/dijeribuganapig.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7182/files/16178518487.pdf
    • https://cdn.shopify.com/s/files/1/0430/9942/2881/files/dedovolokoberetuto.pdf
    • https://cdn.shopify.com/s/files/1/0446/6117/8521/files/can_you_speed_up_edgenuity_videos.pdf
    • https://cdn.shopify.com/s/files/1/0432/6624/4766/files/konizasawenipopiwibusimo.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_off0000703c.bin
83ca1bf2d94752f4f8c7d5fcc8867b3c600b606fac91a5da4fc5dabd649d47ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x703C 4816 bytes
font_01_sfnt_off000080ca.bin
bc18d844af55ebc8182c9b17dfe45f7982d30269f61d65fcf4247858186f7521		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80CA 10192 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.