Malicious PDF — malware analysis report

Static analysis result for SHA-256 344584ba1c1fa54f…

MALICIOUS

PDF

38.4 KB Created: 2020-09-21 06:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 525d5b5be30161d600c2cc2cf0d8de89 SHA-1: 9bacdf4c25c7bbd9e3b6f0e780e2991c48354a3c SHA-256: 344584ba1c1fa54f2d406ecccfe9a9449290f6760eb8de61f55a105e0e20047e
162 Risk Score

Malware Insights

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

This PDF document contains a deceptive "download" button and numerous links to external PDF files, many of which are hosted on SEO-optimized link farms. The primary link redirects to a known malicious infrastructure, indicating a phishing or malware distribution attempt. The document body itself is heavily obfuscated but contains references to the malicious URLs.

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.me/wix?keyword=pathfinder+campaign+setting+the+inner+sea+world+guide+pdf+download
    • http://folajuros.evelynaburns.com/uploads/1/3/0/9/130969723/3ad8d.pdf
    • http://files.aimhealthgta.com/uploads/1/3/0/8/130813899/werowerabuzas.pdf
    • http://files.krabidream.com/uploads/1/3/2/6/132681566/3285554.pdf
    • http://files.alithistlephotography.com/uploads/1/3/1/4/131453354/kigoditiwebuweta.pdf
    • http://files.pinnacleequinesportsmedicine.com/uploads/1/3/0/7/130738596/604554.pdf
    • http://wedalur.musicalfuturesdlownloads.org/uploads/1/3/1/3/131398564/gowenu.pdf
    • http://files.soireeseventsrentals.com/uploads/1/3/2/6/132681880/bizebubud.pdf
    • http://files.jessicabellauthor.com/uploads/1/3/1/6/131637658/nenojukakosajoput.pdf
    • http://files.brianne4housewv.com/uploads/1/3/2/6/132681194/2ec97ad2.pdf
    • http://zotasepev.bhutanmindfultravels.com/uploads/1/3/0/8/130874488/e81c23b9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7285/4939/files/45845173882.pdf
    • https://cdn.shopify.com/s/files/1/0464/8678/2120/files/63525972996.pdf
    • https://cdn.shopify.com/s/files/1/0430/9578/5629/files/queen_of_hearts_crown_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/4532/9832/files/5935243688.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_off00005737.bin
f5a1e518f588dbe5b0636def025467d99a6582f8c48b1526eae530770b415710		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5737 5664 bytes
font_01_sfnt_off00006a65.bin
942640c836b428bfa6682b82549e644a3938ff8d6178a8ffc57fe39e02a5fe28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A65 9896 bytes

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