Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a713058d53a60b…

MALICIOUS

PDF

41.5 KB Created: 2020-08-09 04:39:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72c7a4974a32a8b3705bb52c90f0d714 SHA-1: 8d1c6cbf4984ca994f79e0e8791f2808af245195 SHA-256: 12a713058d53a60bfec36c97e461d680a652e4fb6e2810c6aaf6abed5b6cd021
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.com/pify?keyword=mummies+magic+and+medicine+in+ancient+egypt+pdf`. It also exhibits a PDF link farm heuristic, indicating a large number of outbound links, many of which are to other PDFs. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL, suggesting a lure to external content.

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=mummies+magic+and+medicine+in+ancient+egypt+pdf
    • http://files.globalmissionsinc.org/uploads/1/3/1/4/131406507/tufoxofeto.pdf
    • http://files.stephaniedesigns.net/uploads/1/3/1/3/131384136/223743.pdf
    • http://joduruju.gracelaurent.com/uploads/1/3/1/6/131607163/paxigos_zitirukulano_jesitiba_tidad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/cardiopatias_congenitas_cianoticas.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/diwisiwafufafowibejime.pdf
    • https://cdn.shopify.com/s/files/1/0431/0633/6925/files/34499086780.pdf
    • https://cdn.shopify.com/s/files/1/0429/6425/4883/files/spring_boot_2_documentation.pdf
    • https://cdn.shopify.com/s/files/1/0433/3345/1944/files/jepexugunigu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4563/3691/files/83648701279.pdf
    • https://cdn.shopify.com/s/files/1/0430/9529/4105/files/lepanutujuxixepurifuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/zebit.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/26495691464.pdf
    • https://cdn.shopify.com/s/files/1/0449/2269/9943/files/carl_jung_libro_rojo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5889/6802/files/96551993736.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/avery_5162_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/43748689561.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006484.bin
89c23161e4b9f55229d6b5604e4e0405c4728e741d63a7505af435e2c2054eb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6484 5452 bytes
font_01_sfnt_off00007718.bin
c7b6a47f2df31d32ff78eacf90a49b46faf0d571fe34f2cbe4361045321ba7de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7718 9928 bytes

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