Malicious PDF — malware analysis report

Static analysis result for SHA-256 e10b4fd39e813166…

MALICIOUS

PDF

78.7 KB Created: 2020-09-08 22:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebdbb1be6803947480daedb4650ef6d3 SHA-1: cdbbf4e26eef062b558319374b07a347fc5e489a SHA-256: e10b4fd39e8131669b43e5734ef76e93729a5f088128c8ad84ad2685f17bd4a8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is embedded within the document body, disguised as a link to a PDF about functional programming. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm heuristic further suggests a malicious intent to drive traffic to external sites.

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/wix?keyword=functional+programming+concepts+pdf
    • https://static.usrfiles.com/ugd/9374a7_7aa24f749e9c48fc95776a1a59ff2de6.pdf
    • https://static.usrfiles.com/ugd/5cd33b_c1f79d6f987246a8bad8648b15021d22.pdf
    • https://static.usrfiles.com/ugd/409ca8_03592374a6de44f9bf37467316589220.pdf
    • https://cdn.shopify.com/s/files/1/0433/5324/3816/files/barauni_junction_ka_platform.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3330/files/62373087799.pdf
    • https://cdn.shopify.com/s/files/1/0436/1335/6189/files/cursors_io_hack.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/nenedadakoxomozi.pdf
    • https://static.usrfiles.com/ugd/debdc1_b0b7b5165e314c20b8f704e826adb5f1.pdf
    • https://static.usrfiles.com/ugd/eb5a6a_82e12770feb646dfb5ac500acd8f377d.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_8b76173f1ca145258b0f774f0ad6a673.pdf
    • https://static.usrfiles.com/ugd/253000_dfb522efaa4845dd9382c1318c783096.pdf
    • https://static.usrfiles.com/ugd/2f07a1_de350be80d054abfbeaaf3d2a4b7623f.pdf
    • https://cdn.shopify.com/s/files/1/0432/4442/1282/files/tepanuxuwipubo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4006/3143/files/cutting_tools_in_woodwork.pdf
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/build_tensorflow_from_source.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f164.bin
426dd3c3cba1a13a5c188a2a0d245657cab894b8103c4e435410a605f2d771f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF164 5432 bytes
font_01_sfnt_off000103cb.bin
fe116182d9d4d8fe4b38df8eea0ec19f87fdb15035493c5580ad3527bf435937
pdf-font-stream PDF embedded font (sfnt) at offset 0x103CB 13300 bytes