Malicious PDF — malware analysis report

Static analysis result for SHA-256 1081a47253a8455d…

MALICIOUS

PDF

53.5 KB Created: 2020-08-24 05:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc795d4d865e4511e8c504edfcba8919 SHA-1: bbd497e877323de2ee42d6875faff6eac27c71fc SHA-256: 1081a47253a8455dab3be99a0f77a9b52a5c4259965bf4bd7f9be187d856be09
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate this PDF is designed as a link farm, likely to obscure the final malicious destination. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content, possibly for phishing or malware delivery.

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=battlefield+1++highly+compressed
    • http://rojatiz.saranayoga.com/uploads/1/3/2/8/132814989/mazuxibatuk_bozoke_tiborerix_nubabibebujusun.pdf
    • http://janub.isaiascrow.com/uploads/1/3/2/3/132302978/xuxavenadevilef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rewosegukedisupagur.pdf
    • https://cdn.shopify.com/s/files/1/0429/3646/7623/files/piccadilly_line_map.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/advertising_management_notes_bba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/mabemobonupofenijuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3390/2760/files/matafexugisoba.pdf
    • https://cdn.shopify.com/s/files/1/0430/2507/2282/files/nightjohn_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rodupenewizaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/3451/6376/files/biborudi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kividerinogofigizunewif.pdf
    • https://cdn.shopify.com/s/files/1/0434/1347/1384/files/48874007744.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/bezezetejepazowarogag.pdf
    • https://cdn.shopify.com/s/files/1/0428/1945/3095/files/95103240597.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006763.bin
7931b68dcb4fc3ada8fee5594cac09c9d22ff606cf47935b9fb28413a2f893c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6763 5772 bytes
font_01_sfnt_off00007aeb.bin
66952e6763fd705835f1e3ad40b4a55dc37aca1e53cf33749e2a1d19ff664750		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEB 4148 bytes
font_02_sfnt_off00008a81.bin
cc6def0df8af20cfbeaf194f96fb9ff358815f1f22ad612d07d92efd97abcf30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A81 11224 bytes
font_03_sfnt_off0000b08d.bin
ef6a2f689ac4f77bb3b0155374b0e2fc3412a225ab0228a9b43368fbb8473793		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB08D 17636 bytes

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