Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c7cec6c795cdfd…

MALICIOUS

PDF

55.0 KB Created: 2020-08-31 10:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e97d5fa959bd9e41e529e3f995ca41c SHA-1: b4a97cca3134704c205353cc0d87ecca7a30d464 SHA-256: 15c7cec6c795cdfd19161116a6f5f7f6a15f30bf7fb03544a984160c93a6bc5f
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/wix?keyword=online+horror+games+2019', is identified as a malicious redirector. The document body, though partially corrupted, also contains this URL and text suggesting a lure related to 'online horror games'. The presence of numerous other PDF links, many pointing to Shopify, indicates a link farm strategy. 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.cc/wix?keyword=online+horror+games+2019
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/88719580153.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/wenivavekoboxiki.pdf
    • https://cdn.shopify.com/s/files/1/0429/9928/3861/files/symmetric_tree_leetcode.pdf
    • https://cdn.shopify.com/s/files/1/0437/1975/3879/files/behavior_tracking_chart.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/sowitotiwitep.pdf
    • https://static.usrfiles.com/ugd/87a178_943e03eafbd44e86b13801850387c9e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f42116102f64ca3866508ef0553202b.pdf
    • https://static.usrfiles.com/ugd/90423f_c5371dec0c3443b489b7547e814321bd.pdf
    • https://static.usrfiles.com/ugd/a382ee_1f91b87e8bd34574a0104f17ecd4588f.pdf
    • https://static.usrfiles.com/ugd/08fe48_1c2542bfe55e457f9a17d526b2e60e51.pdf
    • https://static.usrfiles.com/ugd/22739b_f3ee010af048401b9445d04c5ddfd995.pdf
    • https://static.usrfiles.com/ugd/d902bb_72202ea52848483db716c061ccd81ac2.pdf
    • https://static.usrfiles.com/ugd/de65f7_7028f2796c394b8d90980f6528ee331d.pdf
    • https://static.usrfiles.com/ugd/b8c837_4810765cda42431fb55a6e2685f164f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_62e7d0fc78bf44aeb11db80e0ba0244c.pdf
    • https://static.usrfiles.com/ugd/87b9a8_d11b55df7c604fda876ba2bcf6950ff3.pdf
    • https://static.usrfiles.com/ugd/b8c837_e23c022d67d34e72a2dcc95ceb99c577.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fa031943cc14e4887eb4feb4f9d60d0.pdf
    • https://static.usrfiles.com/ugd/3649d2_b9757b2a0263409cad8a1c5cf9fc99d7.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000089bc.bin
5606b4e597f44f9f8cb2605954959c7f5d1f4c94339ce51bb611a69e3854817f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89BC 5316 bytes
font_01_sfnt_off00009b8c.bin
f692df580cb7e4c8435bf1264badeda8b929e68bfbb9e9e59c8c1062180a2d07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B8C 11584 bytes
font_02_sfnt_off0000c07e.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC07E 4324 bytes

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