Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ae73b765a01ed5…

MALICIOUS

PDF

33.8 KB Created: 2020-08-22 23:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a9f5b05c0df6b1cf61c12eae6c0865e SHA-1: 5507fd5c6da77e2b5e85933dbf28da4184e5cc71 SHA-256: 20ae73b765a01ed598945eb88d4e022ca4d1bc10cbc60da569e6b74814c9da27
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically `https://ttraff.ru/pify?keyword=livro+arquitetura+bioclim%25C3%25A1tica+do+espa%25C3%25A7o+p%25C3%25BAblico+pdf`. This technique is often used to obscure the final malicious destination and bypass security controls. The document body, though malformed, suggests a lure related to an architecture book PDF.

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.ru/pify?keyword=livro+arquitetura+bioclim%25C3%25A1tica+do+espa%25C3%25A7o+p%25C3%25BAblico+pdf
    • http://velis.crisiscontrolsolutions.com/uploads/1/3/0/9/130969573/lajezesigarakitati.pdf
    • http://files.fbcmoorestown.org/uploads/1/3/2/3/132302787/zokedok-denaso-dumasejaminizav-xelasupinesot.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3130/files/35558725198.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kivamusefelozadadazub.pdf
    • https://cdn.shopify.com/s/files/1/0429/2250/8447/files/52078136396.pdf
    • https://cdn.shopify.com/s/files/1/0451/3605/2389/files/action_plan_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/monopirolusobepinilipiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/3990/6197/files/19990052110.pdf
    • https://cdn.shopify.com/s/files/1/0438/4263/3890/files/9947323500.pdf
    • https://cdn.shopify.com/s/files/1/0433/1244/7652/files/another_brick_in_the_wall_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/rozesodika.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_off00004183.bin
5cc053714ea21a3908fbcaec3e89fb52479edf1f9b2a5db5e374265b8f5a142a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4183 6100 bytes
font_01_sfnt_off0000551b.bin
f456fea8a59870e8f1971f70de7f4b20371e5d9cfffcbab059395b5699949b6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x551B 11272 bytes

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