Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cba0147ed9de840…

MALICIOUS

PDF

49.1 KB Created: 2020-07-22 17:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e49514636f8948f414a42f1595cd413e SHA-1: 41ec6b3337d04580168081449605c0f833ed600a SHA-256: 0cba0147ed9de840b585f0def0c59a394a34378c70f7e5c6cdea96f9575122f8
162 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files. The presence of a 'download button' heuristic suggests a social engineering lure to trick users into clicking the malicious link.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/wb?keyword=profitability%20index%20formula%20pdf
    • http://files.riverridgebaseball.com/uploads/1/3/1/4/131407061/48cd29f186e.pdf
    • http://files.uvicscuba.com/uploads/1/3/1/4/131437504/4016231.pdf
    • http://files.mychickadeesfuntasticnest.com/uploads/1/3/1/8/131871730/9758372.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/jotilejomezagoxarudawutev.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/jibanisevide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63032467643.pdf
    • https://cdn.shopify.com/s/files/1/0431/3831/8487/files/9765586124.pdf
    • https://loxirarub.files.wordpress.com/2020/07/jagimibeminanudud.pdf
    • https://bifipararavo.files.wordpress.com/2020/07/vajudagitinadanumuli.pdf
    • https://mudofifer.files.wordpress.com/2020/07/58922216191.pdf
    • https://bamigikomiwe.files.wordpress.com/2020/07/dodegepolubes.pdf
    • https://mekuxij428855386.files.wordpress.com/2020/07/19698620948.pdf
    • https://cdn.shopify.com/s/files/1/0431/4975/4519/files/95202943055.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/2099615017.pdf
    • https://cdn.shopify.com/s/files/1/0433/1316/8542/files/80097158411.pdf
    • https://cdn.shopify.com/s/files/1/0430/0449/3987/files/90733178195.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/wonumobiwiliwezusodamoga.pdf
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/parawoteginogenekuxizulex.pdf
    • https://cdn.shopify.com/s/files/1/0428/7650/2175/files/29734458736.pdf
    • https://cdn.shopify.com/s/files/1/0433/6045/2760/files/mudujovobedebidib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pitoparejiki.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_off0000806b.bin
e7301bbd4b367e278e20cac6e583de52037258d059b86eb1cd860366ae78b764
pdf-font-stream PDF embedded font (sfnt) at offset 0x806B 5200 bytes
font_01_sfnt_off000091fe.bin
6c324f604a79c292fc753abe19aa1f51aa7d9593863f8a9ec7751ce1a451731a
pdf-font-stream PDF embedded font (sfnt) at offset 0x91FE 10876 bytes