Malicious PDF — malware analysis report

Static analysis result for SHA-256 a98879897452d3e7…

MALICIOUS

PDF

41.1 KB Created: 2020-08-17 16:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91a5a3a2b4e43a4f95c6dced471c4101 SHA-1: a85b4a31c4b23e54e7f77db239c2d2fcde320f9c SHA-256: a98879897452d3e77799efb98a6c2bd2fc80a9fdeeb92757151e6b0a4b402697
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=keto+diet+weekly+meal+plan+pdf'. The document body, though heavily obfuscated, also contains this URL and a list of other PDF links, suggesting a link farm or redirection tactic. The primary intent appears to be directing users to malicious infrastructure under the guise of a diet plan.

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=keto+diet+weekly+meal+plan+pdf
    • http://files.amselectric.com/uploads/1/3/0/8/130814868/5237300.pdf
    • http://paginonu.fieryoverforty.com/uploads/1/3/1/1/131163930/2259510.pdf
    • http://gaxavuf.jarodhector.com/uploads/1/3/2/6/132682646/a8a9742f.pdf
    • https://cdn.shopify.com/s/files/1/0428/2089/4886/files/pepigovibumopepuramuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/canon_eos_7d_mark_ii_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9397/files/vepijalakokijed.pdf
    • https://cdn.shopify.com/s/files/1/0445/3348/1636/files/macroeconomia_blanchard_download_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lexopiwalosadatijasaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/97636007674.pdf
    • https://cdn.shopify.com/s/files/1/0431/6764/5852/files/30832355133.pdf
    • https://cdn.shopify.com/s/files/1/0434/0688/5027/files/92926828340.pdf
    • https://cdn.shopify.com/s/files/1/0430/4342/2362/files/63089738363.pdf
    • https://cdn.shopify.com/s/files/1/0449/2269/9943/files/72960963713.pdf
    • https://cdn.shopify.com/s/files/1/0434/8562/6520/files/19816066421.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/96190415099.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_off00006311.bin
aea5644b14734b8906fac7c97ba20bd2d510a3d4831a3a3a3299baad697caee3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6311 5140 bytes
font_01_sfnt_off0000749f.bin
2177567de16b5cabf26cda67a881ae889d20e4547f86c99f158387dcc693df16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x749F 10244 bytes

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