Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a18a9746e774e28…

MALICIOUS

PDF

44.2 KB Created: 2020-08-05 17:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5dcd5dcb80296814db24929a35ce0eb6 SHA-1: bc1f27f7ac52ac453852fc0570c07ed569df01b2 SHA-256: 6a18a9746e774e283911c487b061d9240a953d7393950b1c36c49bacec2b46ad
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to malicious infrastructure. The presence of numerous PDF links suggests a link farm used for SEO poisoning or to distribute malicious content.

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/pify?keyword=natural+food+toxicants+pdf
    • http://files.designshowcaseeast.com/uploads/1/3/0/7/130775970/d9a59ff18dbf.pdf
    • http://todufa.shaunmartinmusic.com/uploads/1/3/0/7/130739919/wumud-wizotetupu-zilitifi-xetibiv.pdf
    • http://files.dancetemplesaltspring.com/uploads/1/3/2/7/132740836/rerajogebojadu_xijotap_xoromake.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4536/3610/files/1940271745.pdf
    • https://cdn.shopify.com/s/files/1/0430/6901/4177/files/fajixumuravik.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1969/files/77554437940.pdf
    • https://cdn.shopify.com/s/files/1/0428/7548/6367/files/50726699853.pdf
    • https://cdn.shopify.com/s/files/1/0428/8790/5446/files/55166305409.pdf
    • https://cdn.shopify.com/s/files/1/0430/0744/3103/files/ludexewurijekipiwawa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/borutazaweluv.pdf
    • https://cdn.shopify.com/s/files/1/0437/0595/8565/files/64762232790.pdf
    • https://cdn.shopify.com/s/files/1/0435/3395/9327/files/sensualidad_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0438/9843/7784/files/witexefar.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/zixotorowizototar.pdf
    • https://cdn.shopify.com/s/files/1/0430/9945/5642/files/17967688814.pdf
    • https://cdn.shopify.com/s/files/1/0435/9628/4062/files/skripsi_sejarah_pendidikan_islam.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_off00006eaf.bin
7fe681343378504482c8f7f299bcbad2773379192f127858163420ce7ef185c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAF 5184 bytes
font_01_sfnt_off0000806f.bin
67ea3c4daaa158f91615c1ea70ef8081407bbc318d702117f03ef359304e0cc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x806F 10476 bytes

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