Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac145a170764cd7…

MALICIOUS

PDF

78.1 KB Created: 2020-07-10 19:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19b5c8702366fd1404d5734d23f64e40 SHA-1: 7cccef4ce456057a4eb2bfd4289f20ca28d8f441 SHA-256: 0ac145a170764cd75f3fe977c9eb7f79eb1777c74b227488f7df389295604e50
154 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which appear to be part of a link farm designed to manipulate search engine results. One prominent URL, 'https://ttraff.ru/wb?keyword=pemikiran%20mu'tazilah%20pdf', is identified as a malicious redirector. The document's structure and the presence of these links strongly suggest an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing.

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=pemikiran%20mu
    • http://files.gardenspotrentals.net/uploads/1/3/2/6/132681938/finefenusavat.pdf
    • http://files.sfa-am.ch/uploads/1/3/1/4/131437799/3a8287bbfb8e28e.pdf
    • http://files.gokidtrips.com/uploads/1/3/2/6/132695372/e6e77b49c1.pdf
    • http://files.cymru.tycymorth.org.uk/uploads/1/3/0/7/130775080/kapijibedimisojefuk.pdf
    • http://files.onlinechampionshipwrestling.com/uploads/1/3/1/8/131871727/e9178a886b1522.pdf
    • http://files.islandbeautyportland.com/uploads/1/3/0/9/130969243/522dd448b29a.pdf
    • http://files.allyawl.com/uploads/1/3/1/4/131406741/titururawipu_pivom_dewexep_suguradupowud.pdf
    • http://files.heavygrail.net/uploads/1/3/1/3/131380733/bitat.pdf
    • http://files.ninelivestwine.com/uploads/1/3/0/8/130874629/vezik_gunefitotokek.pdf
    • http://files.ivychurchbristol.org.uk/uploads/1/3/2/8/132814067/metetozugakix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://puroxil.files.wordpress.com/2020/07/90465299737.pdf
    • https://dataxaju.files.wordpress.com/2020/06/jepalawavokememobokaga.pdf
    • https://bakezizo.files.wordpress.com/2020/06/38552313009.pdf
    • https://ledizose460326463.files.wordpress.com/2020/07/74966881721.pdf
    • https://sijujorekij.files.wordpress.com/2020/07/deforuvivulusobevibo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2376/files/lefadamupeka.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lurexemip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56346524494.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pafinekumukomotutawewokab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/munuzajutajamarigeregutoz.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00010142.bin
b440882e030457e492061b254c7463a5a80de4bc4b77b4e2d4d8cba895820f94		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10142 23392 bytes
font_00_sfnt_off0000cce4.bin
3baa10a493b8045396014902f1a024a2357956f454d507b488c176f0ac02200b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE4 5024 bytes
font_01_sfnt_off0000ddc8.bin
8e7b7dde4909822e6e898c3f70ba61ebc1714a1458db94040f4cb10dac9e0351		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC8 10440 bytes

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