Malicious PDF — malware analysis report

Static analysis result for SHA-256 58a4ef871db87c1c…

MALICIOUS

PDF

41.0 KB Created: 2020-07-12 01:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9e9024af6fbfbc9d7da904e8f227e44 SHA-1: 5623b390a7b273dd8aac204dc52386bb08618e05 SHA-256: 58a4ef871db87c1c5cd9e09ae25c485ffeba9ad9dfee18e4ff04ea3b1d23a827
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains a large number of embedded links, a technique commonly used for SEO link farms and to redirect users to malicious sites. The primary redirector URL identified is https://ttraff.ru/wb?keyword=heyday%20wireless%20bluetooth%20earbuds%20manual. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of links to known malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wb?keyword=heyday%20wireless%20bluetooth%20earbuds%20manual
    • http://files.teammissionsports.com/uploads/1/3/0/8/130873830/56fd778fc49d11.pdf
    • http://files.saintalphonsusschool.org/uploads/1/3/1/8/131857071/b41fba5.pdf
    • http://files.nomadwill.com/uploads/1/3/1/4/131437584/9681cc76464.pdf
    • http://files.mnjeweler.com/uploads/1/3/1/4/131437740/fomurogoxufirofaliz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/895492321.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57148414383.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/xanamopeterejesu.pdf
    • https://dexugosaduj.files.wordpress.com/2020/06/furawadux.pdf
    • https://gupasuva.files.wordpress.com/2020/06/75744185009.pdf
    • https://ganepubanot.files.wordpress.com/2020/07/2500826827.pdf
    • https://liregip.files.wordpress.com/2020/07/65832365038.pdf
    • https://sisunozu.files.wordpress.com/2020/06/bevijevolalodi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1674/files/tibipotosusivala.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/woxab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46287179129.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4949/files/zuparawag.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/sijafe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pelezegagujagemubejapo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6838/3642/files/tofimubutosimixoluweb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93867881616.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/99098523877.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_off000061ce.bin
d68eaf70dd44a283c676d3abf317cadd31047ea8516f76a414c2b29fcf17751c
pdf-font-stream PDF embedded font (sfnt) at offset 0x61CE 5240 bytes
font_01_sfnt_off00007381.bin
6256ea3fac47fa8a911fc32f8c3cbabd00d122a36f09a503fdfe02da8c83ab9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7381 10160 bytes