Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e395cf3b5e4b30…

MALICIOUS

PDF

78.8 KB Created: 2020-09-20 06:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5ec28d9fdd6ee921ab1b4e760eef8aef SHA-1: 6a1404364ba006d0136e3a0ec321303edd3e8847 SHA-256: 02e395cf3b5e4b30cc5b85d4f168bb34435de77f29a51082cf4e55e9cccfa112
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, indicating an attempt to direct users to harmful content. The document body, though heavily obfuscated, contains the same malicious URL found in the heuristics, suggesting a lure to a phishing or malware distribution site. 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.ru/wix?keyword=what+is+a+leaping+penalty+in+college+football In PDF document text
    • http://borojufev.evictory108.com/uploads/1/3/1/0/131071063/79c0fefcb472.pdfIn PDF document text
    • http://files.rautoulab.com/uploads/1/3/0/7/130776133/7169791.pdfIn PDF document text
    • http://files.solegalore.com/uploads/1/3/0/9/130968933/wutopijan_tukekufepavukem.pdfIn PDF document text
    • http://xekisa.orlandodeleon.com/uploads/1/3/1/6/131637372/b293d21b83b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1949/3785/files/vipakisekug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/8757/2647/files/analog_to_digital_converter_experiment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2816/9382/files/kajuxubusop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6204/2529/files/naruto_senki_mod_all_anime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3662/2498/files/18404622864.pdfIn PDF document text
    • https://d03b33e9-12fc-4e64-a2fd-2b4c06aff110.filesusr.com/ugd/c75f60_71689f37209e474180579088a7be49a3.pdf?index=trueIn PDF document text
    • https://892e9194-1522-459e-a14e-773723f04331.filesusr.com/ugd/81cd61_faa7047e604a48348ee16c798b0fad01.pdf?index=trueIn PDF document text
    • https://792a44f7-3e70-4de1-8a67-c2527ac27198.filesusr.com/ugd/ef7486_bb56fc06525047489e28665be09ce047.pdf?index=trueIn PDF document text
    • https://24e4b2f1-0e18-4866-9fce-76ffa58000d1.filesusr.com/ugd/0010c8_478deb0882d842029874abb6593fc1bf.pdf?index=trueIn PDF document text
    • https://dcc0e6f8-637b-452e-b682-46d9e9cae772.filesusr.com/ugd/2c76f4_153b906f60a64b57994c303fff53cac7.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8C 5224 bytes
SHA-256: dadd1bf8dc3c08473eee64a0b2cc13d937deb745dc61f7942ff883b235b982de
font_01_sfnt_off0000fd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5A 10120 bytes
SHA-256: 59298f51f58b5c7ecc9eb327dfa34c651e4c770827ad02ffef5e43993523e927
font_02_sfnt_off00011fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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