Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae95f51902bb6de…

MALICIOUS

PDF

66.9 KB Created: 2020-08-09 23:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ce9d1ced8078dea190076faa40febbd SHA-1: ba177004bde67f739a47bae676db1f34a9c58c58 SHA-256: 5ae95f51902bb6de78b3b2526b6edd9e518369ee1a10fbd3346105c9718ce2be
154 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.com', identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Zotero pdf annotation' and the authoring application 'wkhtmltopdf', suggesting a lure. The presence of numerous embedded links, many pointing to Shopify domains hosting PDF files, indicates a link farm or distribution mechanism. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=zotero+pdf+annotation
    • http://files.bridgethjackson.com/uploads/1/3/1/0/131070216/piturovomuvikavabit.pdf
    • http://files.taxperks.net/uploads/1/3/1/3/131380440/290045.pdf
    • http://files.edgertonbookfestival.org/uploads/1/3/1/1/131163559/1010284a28.pdf
    • http://files.mclaughlinesq.com/uploads/1/3/1/4/131407051/fb19b278.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/14050033866.pdf
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/rusobola.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0872/files/paul_richards_krdo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90685913575.pdf
    • https://cdn.shopify.com/s/files/1/0435/3690/8439/files/35321528186.pdf
    • https://cdn.shopify.com/s/files/1/0438/7015/9016/files/5434262219.pdf
    • https://cdn.shopify.com/s/files/1/0431/1187/4716/files/93905671249.pdf
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/85549203881.pdf
    • https://cdn.shopify.com/s/files/1/0435/8638/8136/files/55338094984.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/national_guard_bureau_accelerated_ocs.pdf
    • https://cdn.shopify.com/s/files/1/0428/3973/6487/files/don_t_tell_her_it_s_me.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3dd.bin
755b591bbe9f6d2b6d4d39d185d8479afc12c00e366d72ebc5e5a246ed7ccce0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3DD 4780 bytes
font_01_sfnt_off0000c434.bin
37a91b57ceaec33e43ff1807df934ed0dc2ac6353266b9cfdce3ead86bcb8d60		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC434 10816 bytes
font_02_sfnt_off0000e93b.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE93B 16092 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.