Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab7626ec99eb88b…

MALICIOUS

PDF

51.5 KB Created: 2020-08-11 21:40:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfa844c63ba6e988ff8bb5b1856f137d SHA-1: 9dcb2a3c0cc9dc499fdea8cb6b0d86b6ec9fc21b SHA-256: 7ab7626ec99eb88bfcf7a94e7f4dd1887be490b18785a589cf6a38e0221d7524
162 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, disguised as a dictionary download. The ML classifier strongly indicated maliciousness, and the presence of a "download button" heuristic further supports a social engineering lure. The document body itself contains obfuscated text and embedded URLs, including the primary malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=oxford+collocation+dictionary+download+pdf
    • http://files.oliverwellnessandmassage.com/uploads/1/3/0/7/130776223/3207052.pdf
    • http://files.afesestatesales.com/uploads/1/3/2/7/132710750/buwavevapaxaxajenoru.pdf
    • http://files.classicsmallmotorcycles.com/uploads/1/3/0/9/130969614/fagutatora-bipufazulido-zinefijevame.pdf
    • http://files.yogashak.com/uploads/1/3/0/9/130969910/zevuru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/26564221757.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6397/files/zekamakufurabigosar.pdf
    • https://cdn.shopify.com/s/files/1/0428/1516/0487/files/lic_jeevan_lakshya_premium_chart.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57032902602.pdf
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/history_of_typhoid_fever.pdf
    • https://cdn.shopify.com/s/files/1/0436/9190/1081/files/melofafixazak.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/poneza.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/90850751991.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6661/files/59463847202.pdf
    • https://cdn.shopify.com/s/files/1/0434/1563/4071/files/mepepenidu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/34080373944.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da0.bin
a9073f4ae7d63e7dfd00b8b7575297654549ed66efab80af237d696c0103d200		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA0 4196 bytes
font_01_sfnt_off00007c4c.bin
90622fd724b3881b95929519a721364277dc0aaf97745b9ad057b70119128267		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4C 4928 bytes
font_02_sfnt_off00008d35.bin
9f90be2dd8a2be00839b63ea3c28f89482a614547d20e76feaa2901dd7eac554		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D35 10840 bytes
font_03_sfnt_off0000b1e9.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E9 4324 bytes

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