Malicious PDF — malware analysis report

Static analysis result for SHA-256 682dd5bc5d7637d2…

MALICIOUS

PDF

49.4 KB Created: 2020-09-01 08:19:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e92796faf9f90df0944830a74e54017 SHA-1: 658f6f2b51ba9c32e6052403749ef0a222349ba4 SHA-256: 682dd5bc5d7637d2588a22854f262eda1715e6de3c18ebe0386bdd8220104320
162 Risk Score

Malware Insights

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

The PDF document contains a lure related to a 'shop rental agreement' and embeds multiple links. One of these links, 'https://ttraff.ru/wix?keyword=shop+rental+agreement+format+in+tamil+nadu', is identified as a malicious redirector. The document's structure and the presence of numerous links, including one pointing to malicious infrastructure, suggest an attempt to trick users into navigating to a harmful site, likely for phishing or malware distribution.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wix?keyword=shop+rental+agreement+format+in+tamil+nadu
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/9290/2037/files/dusekosademuguvofofopukeb.pdf
    • https://cdn.shopify.com/s/files/1/0439/4962/1406/files/vocabulary_lists_by_topic.pdf
    • https://cdn.shopify.com/s/files/1/0432/9606/3643/files/79220194845.pdf
    • https://cdn.shopify.com/s/files/1/0461/6962/0643/files/jigudewujurubi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1474/1413/files/jorujofe.pdf
    • https://cdn.shopify.com/s/files/1/0434/2661/1357/files/proyecto_de_tesis_contabilidad.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/16843148947.pdf
    • https://cdn.shopify.com/s/files/1/0465/4684/5854/files/56649416391.pdf
    • https://cdn.shopify.com/s/files/1/0428/4832/1692/files/xizoxupekesasow.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/9737065444.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/zusugose.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/tigosanate.pdf
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/40972700156.pdf
    • https://cdn.shopify.com/s/files/1/0432/0883/5229/files/1634822127.pdf
    • https://cdn.shopify.com/s/files/1/0441/3590/7480/files/ramurenixilutojusupito.pdf
    • https://cdn.shopify.com/s/files/1/0428/8079/4780/files/ribokivupuli.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/miruju.pdf
    • https://cdn.shopify.com/s/files/1/0435/2016/3999/files/fefid.pdf
    • https://cdn.shopify.com/s/files/1/0430/7261/8657/files/data_analysis_worksheet_middle_school.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007529.bin
225b61fbcedb262f8f5f1f1a7c5b079f9571c7ae896aeb22fa564d4d1a3a567b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7529 5264 bytes
font_01_sfnt_off000086cf.bin
2a44d4eb44ffec8e81b9c7abeaeb26d5922f0851074d4d59395d5138a2df1a0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86CF 10588 bytes
font_02_sfnt_off0000a9b7.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9B7 4324 bytes

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