Malicious PDF — malware analysis report

Static analysis result for SHA-256 3878a38d6f0fd97f…

MALICIOUS

PDF

42.4 KB Created: 2020-08-09 05:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c35342e899f34e310a7258d83e30bd11 SHA-1: 527f7eb53913483282a2bf8d22f1e7f75c252d45 SHA-256: 3878a38d6f0fd97fb4f7cbeef8a7374280cd5368b9b8dca6a42ac977051a97bb
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.com/pify?keyword=spanish+to+english+translation+exercises+with+answers+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links, suggesting a lure to external malicious content. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or redirection attack.

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=spanish+to+english+translation+exercises+with+answers+pdf
    • http://files.cannabisforward.org/uploads/1/3/1/4/131408169/7751630.pdf
    • http://povekexiz.tianyugu.com/uploads/1/3/0/8/130814328/6385900.pdf
    • http://files.glennhousevr.com/uploads/1/3/1/4/131453592/joxekelol-jarotevira-kapixafebuti-zewetejid.pdf
    • http://files.impunity.site/uploads/1/3/2/6/132681204/lefopogi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0879/3510/files/81220906579.pdf
    • https://cdn.shopify.com/s/files/1/0432/8272/7067/files/xopokonirumupu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/watch_beauty_and_the_beast_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/6879/2733/files/laxuzoluwixijo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/sawagamotunabuzagisexi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4896/8100/files/43559660447.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/gixelalukiwimumima.pdf
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/67528089470.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/63004637434.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_off000066b5.bin
e05c32fbb511d2ff79f2c621fac2e8c4cbd3b3923b96074fa8ca7f89b565463c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B5 5680 bytes
font_01_sfnt_off00007a1f.bin
99703b788a0c3e317604c2e96a7cfeaf28697dc052082543ce4cb938bf6930d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1F 10072 bytes

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