Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f74edcac33543b6…

MALICIOUS

PDF

45.2 KB Created: 2020-09-14 12:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89132ca4cb9ce3a6a69e500c55d1e73e SHA-1: f4ed127dfa04e9f7c7559d3bf18c395a93fd6894 SHA-256: 7f74edcac33543b6e35caf112360598383ca35dc89b1a4416ef2318ffe49b2e6
154 Risk Score

Malware Insights

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

The PDF document contains embedded links that are part of a link farm, with one primary link identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a ferry schedule, likely serving as a lure. The ML classifier strongly indicated maliciousness, and the presence of numerous PDF links suggests an attempt to distribute further malicious content or engage in SEO manipulation for malicious 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=bald+head+island+ferry+schedule
    • http://kimapaxup.bbt-livonia.com/uploads/1/3/2/3/132303354/18d0dca34.pdf
    • http://files.marissagable.com/uploads/1/3/1/3/131380341/7249262.pdf
    • http://rixis.ericsreyes.com/uploads/1/3/1/8/131856666/visigeteba_pufufafekum_zaresegexogukis.pdf
    • http://kaduwiz.debbieyoung.co.uk/uploads/1/3/1/6/131636698/zizigujaxonafuz-jigigapurewusuj-webud-fatazov.pdf
    • http://fokomunun.texasthymeunit.org/uploads/1/3/0/8/130874043/1758866.pdf
    • http://bowefoxot.clairescraftsonline.co.uk/uploads/1/3/0/7/130775997/5686086.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/1849a1_099bcbb2ac4b41ea8a590c0b3f090800.pdf
    • https://static.usrfiles.com/ugd/bdc04d_01137a698ba64262a18964f2530bb342.pdf
    • https://static.usrfiles.com/ugd/b222ea_ea433801f87e4c568a5ea0d2ebb73975.pdf
    • https://static.usrfiles.com/ugd/d5d855_b1bac2b8a3b0485aacee2c7b051db5a5.pdf
    • https://static.usrfiles.com/ugd/696117_b49b5a125b4c4ce79ebf795907f9cd76.pdf
    • https://static.usrfiles.com/ugd/63022f_86c7ad78eb9f40a5b3285e7d9a3dd6bd.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_off000066b6.bin
8f1a803d8035a22c891570d90306b6baff28ab9b332cc7c39b17af7840619079		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B6 4952 bytes
font_01_sfnt_off00007777.bin
e57ea871a96e11b80da94daf293675b4b5bb2b5e3c42811190e6062470488424		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7777 10016 bytes
font_02_sfnt_off000099cc.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99CC 4324 bytes

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