Malicious PDF — malware analysis report

Static analysis result for SHA-256 395478ba6f4527e7…

MALICIOUS

PDF

46.9 KB Created: 2020-07-29 03:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7826d0ed662e55c345026ae3888b6881 SHA-1: 1dbc79c8fbb17e107f703174b771c248877e3032 SHA-256: 395478ba6f4527e748f73064227ca98bd745e0f06b6b3e5ddace2669eacdff8f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a significant number of embedded links, identified as a link farm. One critical heuristic indicates a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The primary attack pattern involves directing users to potentially harmful external sites.

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=manualidades+con+madera+rustica
    • http://files.ioliteraryjournal.com/uploads/1/3/0/9/130969480/3765d30e211f.pdf
    • http://files.pupsontherunway.com/uploads/1/3/1/4/131438500/719ed56ed3.pdf
    • http://files.path2wine.com/uploads/1/3/1/3/131380875/aae37673f9.pdf
    • http://files.jjfdirect.com/uploads/1/3/0/7/130776674/72c29741.pdf
    • http://files.slk-photography.com/uploads/1/3/0/9/130969448/6749116.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0432/5788/8932/files/77909144772.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/26602334484.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xokuwunojuvilil.pdf
    • https://cdn.shopify.com/s/files/1/0436/5529/9237/files/vokifase.pdf
    • https://cdn.shopify.com/s/files/1/0441/4259/2152/files/deguzediperesuwijejagok.pdf
    • https://cdn.shopify.com/s/files/1/0430/3273/9989/files/75151311999.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/juxanoxuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/tikokiwuzemesugoxifan.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5669/files/92652163591.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3669/files/kisekeda.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_off00007c94.bin
3ca337fa3dd20bb11a0f5aed1c3f931ee12721d8ecee46e5b54548f7ad72e705		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C94 4972 bytes
font_01_sfnt_off00008d54.bin
4816905f069c5b344de69dfb7d5d30cb4c640d80ac14c1d5e3879266dbe17d3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D54 9556 bytes

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