Malicious PDF — malware analysis report

Static analysis result for SHA-256 976958fd956fe5e9…

MALICIOUS

PDF

49.6 KB Created: 2020-09-20 09:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e907429b39080dd677aff55392050207 SHA-1: 4de0916e4577b5380b96efbd755b69b545d2500f SHA-256: 976958fd956fe5e95180a748ae1e7668f2b91b6983a319587be2943bd0d06d87
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 'https://ttraff.club/wix?keyword=rwby+beowolf+lemon'. Additionally, it features a mass external PDF link farm, with the dominant host being 'files.deborahlawrenceschafer.com'. The ML classifier also strongly flagged this PDF as malicious. These indicators suggest the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or scamming purposes.

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.club/wix?keyword=rwby+beowolf+lemon
    • http://files.deborahlawrenceschafer.com/uploads/1/3/0/8/130813747/10191.pdf
    • http://rejuxapuf.junctionhillpentecostalchurch.com/uploads/1/3/1/6/131636908/fetokefobon.pdf
    • http://files.azpowerriders.com/uploads/1/3/0/7/130739488/daxuzowikuponet.pdf
    • http://files.theohanadivecompany.com/uploads/1/3/1/3/131380850/5339a97182b360f.pdf
    • http://jasud.learnandleadec.com/uploads/1/3/1/6/131606177/4178446.pdf
    • https://581f4d68-99f8-48ae-b2ea-55791afde9b6.filesusr.com/ugd/73c254_7903fd5a1c4f441194c83af471fb4eba.pdf?index=true
    • https://f81cc628-1a6d-446c-9c88-a2bf2d9cad8d.filesusr.com/ugd/0b46e6_7d8d55c1c73c4fb0ac5f5c76bf0d468d.pdf?index=true
    • https://19cdac54-7bed-404d-a86a-a57bebae83ec.filesusr.com/ugd/f390e7_6ca6fec26d694f038b4240c8f898dbf1.pdf?index=true
    • https://90d80190-91a9-4a07-bee0-12ce47492050.filesusr.com/ugd/cbdbb6_8bddc607275a49cc9a0ad9e371d073b1.pdf?index=true
    • https://ae8e79d1-27bc-4ff1-8d0a-8d69ff9e3f27.filesusr.com/ugd/e78b77_879739aec07446e79ee9813f9906f315.pdf?index=true
    • https://78d8300e-6635-4650-be33-14543500229a.filesusr.com/ugd/76aeb6_73bf45e53bf0444a8fd1d33b3baf7e21.pdf?index=true
    • https://a65832b2-495e-466d-b26f-adc1b62bef52.filesusr.com/ugd/e2c250_c8e734ebeac441d494297fe7bd126328.pdf?index=true
    • 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_off00008679.bin
38e7d4570b1fdaaa9e8a7873fbe7e6f9447881a56be76b708cc451dd72d05902
pdf-font-stream PDF embedded font (sfnt) at offset 0x8679 4772 bytes
font_01_sfnt_off000096c9.bin
92a4d3f289577e731bf7d9a939c686cdff7bc573976b969df6f4cb506848294b
pdf-font-stream PDF embedded font (sfnt) at offset 0x96C9 10228 bytes