Malicious PDF — malware analysis report

Static analysis result for SHA-256 e04491047f55513f…

MALICIOUS

PDF

101.8 KB Created: 2020-08-20 02:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cc101f9ef19f9ede2fecb0ca38d1774 SHA-1: 1e8e86759e53d773207387a5d4a587cc7bdcb5b1 SHA-256: e04491047f55513f73e523052cbad3f63c24a0b60dbd18d32678ca2a230cac13
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=zbigniew+brzezinski+books+free'. This URL is presented within the document body, suggesting a social engineering lure related to book offers. The PDF also exhibits characteristics of a link farm, with numerous external links, further supporting the malicious intent of directing users to potentially harmful sites. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=zbigniew+brzezinski+books+free
    • http://files.goldeneardigital.com/uploads/1/3/2/6/132695213/451726.pdf
    • http://files.sfvlsa.org/uploads/1/3/1/6/131606402/819e1.pdf
    • https://cdn.shopify.com/s/files/1/0454/5708/0472/files/calotropis_procera_morphology.pdf
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/89358178442.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/vemanigotijezaridil.pdf
    • https://cdn.shopify.com/s/files/1/0440/8049/6792/files/cultivo_de_cebolla_china.pdf
    • https://cdn.shopify.com/s/files/1/0432/8344/7968/files/libro_sagrado_del_budismo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9127/files/forerupinuwebiwopuro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9947/2551/files/8180849322.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/58138818446.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/the_fall_of_rome_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/6244/3675/files/nepejadesamut.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2813/files/56132012760.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014300.bin
873fd2673b4fb9d6896330b1a8837db16075ceae9e51940f1a92730aeb7b8e06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14300 4996 bytes
font_01_sfnt_off00015437.bin
34a582d314fd4b1541d637d895969b82d356461eefc20ce3cc73afb0b2e9d497		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15437 16516 bytes

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