Malicious PDF — malware analysis report

Static analysis result for SHA-256 629ec0b3fd827236…

MALICIOUS

PDF

40.8 KB Created: 2020-08-10 11:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 251872b30c573937a816d41791c82a96 SHA-1: 825eb41591a91523d1be0ad0ca63f741032bc8cc SHA-256: 629ec0b3fd827236d77bf8158cef1def68e3929a54555c3516e67cb5810d54e8
162 Risk Score

Malware Insights

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

The sample is a PDF document that contains numerous links, many of which point to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=batching+plant+project+report+pdf`. The presence of a large number of PDF links, many of which are hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=batching+plant+project+report+pdf
    • http://mujos.kingstreetbeer.ca/uploads/1/3/1/4/131482995/eb280629886e.pdf
    • http://files.artwithross.com/uploads/1/3/0/9/130969488/kutageguj_lusitezikoguno.pdf
    • http://files.apacheautomotive.com/uploads/1/3/2/7/132740285/95d8f070c.pdf
    • http://files.jovaunholmes.com/uploads/1/3/0/8/130873973/818c81.pdf
    • http://files.26anderbycreek.com/uploads/1/3/1/4/131483098/7724809.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4900/0864/files/mitaz.pdf
    • https://cdn.shopify.com/s/files/1/0440/2734/7109/files/nixujenopiwosifabijili.pdf
    • https://cdn.shopify.com/s/files/1/0428/5582/5567/files/6421936843.pdf
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/xupipi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/56315699580.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/bigamabulevorumol.pdf
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/tinabenemamakoxogofob.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3801/files/43432754190.pdf
    • https://cdn.shopify.com/s/files/1/0428/9721/1558/files/55094358174.pdf
    • https://cdn.shopify.com/s/files/1/0437/4380/5594/files/71719513512.pdf
    • https://cdn.shopify.com/s/files/1/0437/6068/1111/files/john_deere_l100_parts_manual.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_off000060b8.bin
f3471889ab471e2e75d1362c27e4dc4322698c5d953d6a4b2bf84efc830d43d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B8 5364 bytes
font_01_sfnt_off000072f8.bin
c03eb297b84116168649c910878b9b1182b7314904212527d0599e61cfc0f15f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F8 10408 bytes

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