Malicious PDF — malware analysis report

Static analysis result for SHA-256 808f1e90e6152d07…

MALICIOUS

PDF

101.1 KB Created: 2020-08-18 21:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39c1020520a0e126604ede2b2ce3a929 SHA-1: b70275d2badd3ff4f94d8bcf3aa6e1d8fcd31b9a SHA-256: 808f1e90e6152d075d38c1595476ca3fdd10bb0c2315c6267a9a8c590afc393a
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=alcatraz+prison+guard+uniform', which is designed to lead users to further malicious content. The document also exhibits characteristics of a link farm, with numerous embedded URLs, suggesting an attempt to generate traffic or distribute malware. The ML classifier strongly flagged this PDF as malicious, reinforcing the assessment of a malicious intent.

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/pify?keyword=alcatraz+prison+guard+uniform
    • http://misujo.prolyticsconsulting.com/uploads/1/3/0/7/130740510/ee30ef0eb57.pdf
    • http://files.saskatoonnutanalions.com/uploads/1/3/0/7/130739146/4554800.pdf
    • http://files.happycentric.com/uploads/1/3/1/6/131637402/futokiwubijovax.pdf
    • http://files.soarisemusic.com/uploads/1/3/1/6/131637271/padesa-zajufewun.pdf
    • http://files.sarahtorti.com/uploads/1/3/0/9/130969368/newabazu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3595/1257/files/pudonebiseviwegi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/rugemewubukojepozado.pdf
    • https://cdn.shopify.com/s/files/1/0431/6531/9324/files/vogurejajej.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/sojajob.pdf
    • https://cdn.shopify.com/s/files/1/0431/9733/3664/files/mirijixanata.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7452/files/5141166788.pdf
    • https://cdn.shopify.com/s/files/1/0432/3485/3021/files/31356557452.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5580/files/bapozupavusa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7714/8571/files/suffix_worksheets_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6379/files/facebook_bug_report_email.pdf
    • https://cdn.shopify.com/s/files/1/0440/8901/6472/files/cambridge_english_advanced_trainer_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9472/1187/files/90393136569.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013544.bin
aa818078653919720ecc6dce036aa0ba0502764cf3cff5809eff89d9a2fea3c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13544 5512 bytes
font_01_sfnt_off000147ec.bin
33d339b45ad11398a4dd9ae4048004aa9d54a26951ce34a9b20f756b79ee8dd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147EC 11940 bytes
font_02_sfnt_off00016fe7.bin
63fd864e8cd42e7ffddbf1d1e0da1a22675de6d8121ceb8afe00075fec24c612		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16FE7 16540 bytes

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