Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e450ef05c7e9d06…

MALICIOUS

PDF

43.4 KB Created: 2020-07-09 04:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1da018dee52adc23f1c2a687dd65820 SHA-1: cf1c371ed76ce98a96d31b808c35a34fb5de805d SHA-256: 5e450ef05c7e9d067c0866d8c6970ec5a685717026a25b79f479745875e5980d
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One URL, 'https://ttraff.ru/wb?keyword=manual%20spice%20grinder%20australia', is identified as a malicious redirector. The sheer volume of links suggests a link farm or a phishing attempt to direct users to potentially harmful content. No scripts were extracted, but the PDF structure itself is used to host and distribute these links.

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=manual%20spice%20grinder%20australia
    • http://files.chinookwritingandjournaling.com/uploads/1/3/1/4/131454264/nebebebevap-vutugafe.pdf
    • http://files.rsvpvolunteercaregivers.org/uploads/1/3/2/6/132681824/navate.pdf
    • http://files.faithgoenner.com/uploads/1/3/0/7/130775341/6100779.pdf
    • http://files.iwstreecare.com/uploads/1/3/2/7/132740479/wogupu-zukokitoruwogog-zikezugufada-pubuzesilas.pdf
    • http://files.annishealinggarden.com.au/uploads/1/3/0/7/130776864/kuxafixogudaruwuje.pdf
    • http://files.designsbymegan.com/uploads/1/3/0/8/130813381/nisaf-zatilokivesudo-najosozosopas-kumupiwiremef.pdf
    • http://files.timmalm23.com/uploads/1/3/0/8/130814785/sotevabofef.pdf
    • http://files.janine-kitzen.com/uploads/1/3/1/3/131380482/eb466042.pdf
    • http://files.erikawhitney.com/uploads/1/3/0/8/130814076/1557248.pdf
    • http://files.superdiscountwigs.com/uploads/1/3/1/3/131384121/terobasugivitu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://tefifut.files.wordpress.com/2020/07/44618413383.pdf
    • https://wegagimutem.files.wordpress.com/2020/07/zibijojabuvoxapenigego.pdf
    • https://gozikes.files.wordpress.com/2020/06/nazerosowutomanokewag.pdf
    • https://balebodi.files.wordpress.com/2020/07/40083319507.pdf
    • https://giduwifun.files.wordpress.com/2020/06/mimedisiserok.pdf
    • https://magapabiv.files.wordpress.com/2020/06/11483722937.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7082322425.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23929268289.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39738284996.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupesuditijativerawepafu.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_off00006c40.bin
239f5289e8e13bc731f2ee0c8adb67c942ffd7263999ec85fe83f9324a08101c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C40 5020 bytes
font_01_sfnt_off00007d58.bin
aef497bb7548722d147cabda745d13b46f4be84330e885fccac06b18ea5d0c26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D58 10508 bytes

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