Malicious PDF — malware analysis report

Static analysis result for SHA-256 6246dd8234e6b60b…

MALICIOUS

PDF

40.7 KB Created: 2020-07-08 18:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 676eaef87ea7dce35586c07f8a410bab SHA-1: 3abb0e1c0208760deb831c1ab3983026fa0a523d SHA-256: 6246dd8234e6b60b6e5b2a4f634cbe4b85ad08366ed26f482d443f3d7a89095f
194 Risk Score

Malware Insights

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

This PDF document contains numerous links to external resources, including a redirector URL (https://ttraff.cc/wb?keyword=flattened%20vs%20unflattened%20pdf) and a large number of PDF files hosted on various domains. The presence of a malicious redirector and the sheer volume of links suggest an attempt to distribute malicious content or conduct phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.cc/wb?keyword=flattened%20vs%20unflattened%20pdf In PDF document text
    • http://files.upwellings.com/uploads/1/3/1/6/131607174/c3eb020e.pdfIn PDF document text
    • http://files.nancythomas.org/uploads/1/3/0/8/130814189/905986.pdfIn PDF document text
    • http://files.sevenstarsselfcatering.co.uk/uploads/1/3/1/3/131379552/4308544.pdfIn PDF document text
    • http://files.sisterlocks.com/uploads/1/3/1/4/131437636/f1af154bc5d2.pdfIn PDF document text
    • http://files.chardoncommunityactionteam.org/uploads/1/3/1/3/131384018/pugotut-newifuniz.pdfIn PDF document text
    • http://files.hlhas.com/uploads/1/3/1/4/131483550/wuvoxipepuzan.pdfIn PDF document text
    • http://files.jonathankotyk.com/uploads/1/3/0/7/130738562/noxewakomu.pdfIn PDF document text
    • http://files.ieleaders.net/uploads/1/3/0/7/130776718/45c35ab516bd.pdfIn PDF document text
    • http://files.wpbchiropractor.com/uploads/1/3/1/8/131856950/7241857.pdfIn PDF document text
    • http://files.constancewashburn.com/uploads/1/3/2/3/132302810/dupid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://gexefaduxoka.files.wordpress.com/2020/07/48237182085.pdfIn PDF document text
    • https://gukegowiv.files.wordpress.com/2020/06/fiveta.pdfIn PDF document text
    • https://rotuwepene1407802.files.wordpress.com/2020/06/28266905475.pdfIn PDF document text
    • https://nedidama.files.wordpress.com/2020/07/ponugufobofelepinevexom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8584587797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8861538602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sivezijikok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20424522606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nagexonulelaxefirulilona.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E9 4680 bytes
SHA-256: e14e558f40ab3704a666b60324b78a9c3073ecb53f008f216d4d5cd3a0e20fe6
font_01_sfnt_off000074e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E7 9560 bytes
SHA-256: 486c15143211ae7b6a7d9c939e378c85ac2cae093d54c77d629a6db78cc541d1