Malicious PDF — malware analysis report

Static analysis result for SHA-256 55d5a331582590d0…

MALICIOUS

PDF

65.4 KB Created: 2020-09-19 02:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b14f43652577a3cc80e6f2a670eb9bc SHA-1: bb8f13df407ef92ebbf15c4bfd349f19474c2b0f SHA-256: 55d5a331582590d0807984159a4b58616e233b4379b729e0b9c9b384efd12d43
128 Risk Score

Malware Insights

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

The PDF contains a call-to-action phrase and embeds multiple links, including one pointing to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the redirector. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely for SEO manipulation or to obscure the malicious destination. The presence of a download button lure further supports the malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/wix?keyword=showbox+apk+update
    • http://senubo.prolyticsconsulting.com/uploads/1/3/1/4/131406710/ee1d2.pdf
    • http://files.alexandremiller.com/uploads/1/3/2/6/132680974/bidowaxiju-fodumovif.pdf
    • http://mazupa.thecarbunclemoon.com/uploads/1/3/2/8/132814007/353e05372f988.pdf
    • https://cdn.shopify.com/s/files/1/0429/7143/1065/files/75059252402.pdf
    • https://cdn.shopify.com/s/files/1/0438/5384/0534/files/shawn_mendes_houston_setlist.pdf
    • https://cdn.shopify.com/s/files/1/0431/8124/4573/files/gerimojenanimizinit.pdf
    • https://cdn.shopify.com/s/files/1/0435/3412/3160/files/65929388038.pdf
    • https://cdn.shopify.com/s/files/1/0429/5009/9107/files/83913942587.pdf
    • https://cdn.shopify.com/s/files/1/0428/2132/0870/files/ark_survival_evolved_parasaur_taming_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/56501469269.pdf
    • https://cdn.shopify.com/s/files/1/0435/4179/0871/files/98128480922.pdf
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/83819178330.pdf
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/todefoxizipumumaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6444/2521/files/89923364599.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6471/files/senaradazomepavo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1633/1172/files/conjunctions_in_english_grammar_with_examples.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_off0000c21d.bin
ae6375ce0ec45e1196d3cc90a99d349988ed5ad4e8665f1a6989407c331e7947
pdf-font-stream PDF embedded font (sfnt) at offset 0xC21D 5208 bytes
font_01_sfnt_off0000d3e3.bin
c7bda031c6945bd6ff81a89dbb72d99fd0bd0597914e32a44300846ef0d42ccf
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E3 10816 bytes