Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad010398da1b8cd…

MALICIOUS

PDF

48.0 KB Created: 2020-07-10 01:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 615ad3ac72ed349e17a8d97d5b0adf6a SHA-1: 1ebea0ffb818b994c5c2987c4d9380e2a690d640 SHA-256: 5ad010398da1b8cd43e13604f0326a41d89464c73087ffdae8698e7af4133bec
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded URLs, indicating it is part of a link farm or SEO spam campaign. One URL points to known malicious redirector infrastructure, and many others lead to PDFs hosted on various domains. The ML classifier strongly flagged this sample as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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/wb?keyword=uniden%20bc125at%20scanner%20manual
    • http://files.all-naturalchiro.com/uploads/1/3/2/7/132741020/zimiwusomujib-xulojuxe-buralizi.pdf
    • http://files.normanmuseum.org/uploads/1/3/1/3/131379815/lukagesan.pdf
    • http://files.peaceplaceinc.org/uploads/1/3/1/1/131163955/webumotonela.pdf
    • http://files.messiahfamilies.com/uploads/1/3/1/4/131406075/tulawofiruz-fanawe-tusefebegatisof.pdf
    • http://files.tilliesnevada.com/uploads/1/3/1/3/131379612/xapixivote-pipugu-neruxesivalu-wifuf.pdf
    • http://files.edhgs.com/uploads/1/3/1/4/131408529/lujaremokike_nezuki_derunelizaxeti_kelabij.pdf
    • http://files.williammonaguenativeart.com/uploads/1/3/0/7/130739747/vunidegote.pdf
    • http://files.branchblaze.org/uploads/1/3/1/3/131398171/51da234b9bee00.pdf
    • http://files.thepiteamofillinois.com/uploads/1/3/1/4/131408241/wobosinemasaje_sikuzuburunime_katipa_ronuwuri.pdf
    • http://files.crossoverkicks.com/uploads/1/3/1/4/131454492/lagixozinu_vererasunixeniz_xabav.pdf
    • http://files.fengshuixing.com/uploads/1/3/2/7/132740730/fowejotenivirup_kazivel_zokomafig_kirixiranu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ketikukowef.files.wordpress.com/2020/06/77848132628.pdf
    • https://sosasifen.files.wordpress.com/2020/06/67739870585.pdf
    • https://savakuwi.files.wordpress.com/2020/06/91383816202.pdf
    • https://basilikavo.files.wordpress.com/2020/07/55272160375.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54058680795.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lonub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rixozuxixewu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.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_off00007558.bin
e040c3b0aef9718a97e0dd1a2a49aaba9599faa028fbd04f492b6597ed015a85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7558 5296 bytes
font_01_sfnt_off0000873b.bin
1713df1c191ec61788f5918a17f44ed369d8cb112fd8d52825bc51219d34525b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x873B 14064 bytes

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