Malicious PDF — malware analysis report

Static analysis result for SHA-256 15faddc4366cffe2…

MALICIOUS

PDF

41.2 KB Created: 2020-08-29 14:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac3120972035ceeac92bfdc65dadc4fc SHA-1: 6c848c53927b15d2e34610d3b524e8f489ba2a85 SHA-256: 15faddc4366cffe2d03acc1548f70a68dd59bb6b6575efed563fce1fdf9befe9
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which point to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the malicious URL and references to 'endangered animals lesson plans ks2', suggesting a lure to disguise the malicious intent. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly indicate a phishing or malicious redirection attempt.

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.ru/wix?keyword=endangered+animals+lesson+plans+ks2
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/7757/4557/files/wuxadisarukovimida.pdf
    • https://cdn.shopify.com/s/files/1/0431/6508/9941/files/submit_form_to_web_server.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/cetoprofeno_100_bula.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/lutimawukolux.pdf
    • https://static.usrfiles.com/ugd/0aab01_157a17a13db1476fa4a21083fac8e751.pdf
    • https://static.usrfiles.com/ugd/b8c837_c56c23667a3c4f32b15b664030b16ee7.pdf
    • https://static.usrfiles.com/ugd/b8c837_97127c41518d436d95f93a6150ba9786.pdf
    • https://static.usrfiles.com/ugd/b8c837_76c30cc56cbc4a86933abdb895df313a.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec80e12df15e4f289b8c212a7c91ffeb.pdf
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/98342096675.pdf
    • https://cdn.shopify.com/s/files/1/0430/0124/9955/files/33073968067.pdf
    • https://cdn.shopify.com/s/files/1/0431/9635/0624/files/wezebeviweb.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdc2cf9ebb4d4a149e0e175c238cc992.pdf
    • https://static.usrfiles.com/ugd/b8c837_df862a985ff243a591942ac85a3a11a0.pdf
    • https://static.usrfiles.com/ugd/cac9e4_00b65b1cae7c4b00b2b8e2687a40e154.pdf
    • https://static.usrfiles.com/ugd/b8c837_b84d843531194d71a67304b8dfd708a3.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_off000055cc.bin
a057f720094d1ab78cbbc1a6cbb4b7130cc47570b7899b47966e5ae1cd0a1446		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55CC 5140 bytes
font_01_sfnt_off00006721.bin
f92c3edaaffef94be05c4f2fbee4987fd3908f2e661e5cf7bc607bde53309fca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6721 10088 bytes
font_02_sfnt_off00008960.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8960 4324 bytes

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