Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f827c0a22f151e0…

MALICIOUS

PDF

42.5 KB Created: 2020-08-15 16:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7651861453821961726c2dfc95c9934 SHA-1: 9ae799cd8946b862c5e0f55e583f636df99448f8 SHA-256: 0f827c0a22f151e045c760fe53997c33351583bc1bec34b9a54c3b18ef04167d
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it's a malicious redirector and employs social engineering lures like a download button and a fake browser update prompt. It links to a known malicious redirector URL, ttraff.com, which likely serves as a gateway to further malicious content. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it's designed to trick users into navigating to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=pdf%20to%20hd%20image%20converter%20free%20online
    • http://fedoto.iahaschools.com/uploads/1/3/0/7/130776485/xajem.pdf
    • http://files.pikespeakradon.com/uploads/1/3/0/8/130814055/44b0833603b40.pdf
    • http://files.statenislandfriendshipclubs.com/uploads/1/3/2/7/132712011/xuguz-muwufanubu.pdf
    • http://files.texascoastalexchange.org/uploads/1/3/2/6/132695372/fe55987b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4952/5149/files/pazarorufutode.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/58482733653.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/cuestionario_de_afrontamiento_del_estres.pdf
    • https://cdn.shopify.com/s/files/1/0431/7878/6965/files/nuregu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0157/6615/files/ncert_biology_practical_book_for_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0431/8878/1219/files/49082951121.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/85445693677.pdf
    • https://cdn.shopify.com/s/files/1/0432/6935/7728/files/laxoniwokuruvudapafa.pdf
    • https://cdn.shopify.com/s/files/1/0439/4817/9611/files/37264684562.pdf
    • https://cdn.shopify.com/s/files/1/0439/4080/6824/files/40806056740.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_off00006916.bin
069fe64ac3f267c8d90314fb12ff9d11561fa5b6bc54d2cc2d709cb3707830e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6916 5320 bytes
font_01_sfnt_off00007b08.bin
6e155049c7525f3d07348518867690821722ca0c2869cc68486700b4474d824f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B08 9860 bytes

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