Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f44409ee8c244a…

MALICIOUS

PDF

41.7 KB Created: 2020-08-19 10:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a09930b48f001845ca3e140de0af36aa SHA-1: d82c1e48398405bf874d0c3e66ea7735dad93145 SHA-256: d7f44409ee8c244ab758106dc28c9c13867a15c13bde51ca37a258eb8c44e1b0
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains references to educational content and URLs pointing to a large number of PDFs hosted on Shopify, suggesting a link farm or SEO poisoning tactic to attract victims. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=calculating+volume+worksheet+works+answers
    • http://files.swornoathbrand.com/uploads/1/3/1/4/131407361/gedozarovomizudob.pdf
    • http://files.bfmic.info/uploads/1/3/2/6/132681670/2052862.pdf
    • http://files.ulsupride.ca/uploads/1/3/1/4/131452952/56c4d9f1ae233.pdf
    • http://daturawig.simoneczech.com/uploads/1/3/1/4/131455734/9ebede.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/25897521846.pdf
    • https://cdn.shopify.com/s/files/1/0434/0436/1884/files/kekivozubafijutatugad.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/79240026115.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/43336905621.pdf
    • https://cdn.shopify.com/s/files/1/0429/7746/0383/files/nabonusodatofenakib.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/gunibo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/26564779907.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/94270902839.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/asuransi_kesehatan_syariah.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9430/files/godogulorogakarijikeg.pdf
    • https://cdn.shopify.com/s/files/1/0454/7497/1800/files/rikoliduwufunafuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/26442211285.pdf
    • https://cdn.shopify.com/s/files/1/0430/9663/7597/files/88479630693.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_off00006549.bin
936dbb69b1bff8c9ffa7a46a0a36fe5b328d44f6f1391b8d60c4f4d504436771		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6549 5336 bytes
font_01_sfnt_off00007756.bin
adf440384dc6b4761f2b8509e2ee70b110daa14c2ac801d998d5fd1f02ca8d7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7756 10040 bytes

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