Malicious PDF — malware analysis report

Static analysis result for SHA-256 581a5f7aafdadcf3…

MALICIOUS

PDF

41.9 KB Created: 2020-08-09 07:28:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 041884844b754172d3ca2d059153b644 SHA-1: 8c7c2c1e85d80a411fe94a482894f845648e8644 SHA-256: 581a5f7aafdadcf3056e67bdad2521b7c09d636eb89d380800fb2e704b5db74a
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found in the heuristics. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware delivery.

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.cc/pify?keyword=functional+data+analysis+book+pdf
    • http://vilabo.jimglasscorvette.com/uploads/1/3/0/7/130776445/jogodesijomuxa_tegumuwivu_bojegor.pdf
    • http://joraxilid.sailstutoring.com/uploads/1/3/1/4/131437246/e52c44f.pdf
    • http://files.carusimsband.com/uploads/1/3/2/7/132712214/5f0d5cb8e2cb19.pdf
    • http://files.darvanadoulaservices.com/uploads/1/3/0/7/130775959/godujabu-gowesor-rizofokezopa.pdf
    • http://files.thenaturalflame.com/uploads/1/3/0/8/130813134/dumitikega_kujefipof_rusutukak_zogolilerinud.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/90739746534.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41448402009.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/86617731039.pdf
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/ccdp_arch_300_320_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/equivalent_fractions_ks2.pdf
    • https://cdn.shopify.com/s/files/1/0432/8564/3420/files/19493564128.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/bejisagujojitif.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/36058675790.pdf
    • https://cdn.shopify.com/s/files/1/0429/1136/7331/files/yep_message_core.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/93089204528.pdf
    • https://cdn.shopify.com/s/files/1/0431/8468/5224/files/tixeveguxikemoralejusofew.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1077/files/lazik.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_off000066a5.bin
69b1816c2bd979211ade0df2e988a049a409af3591c9d171e8690c851b31b5b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A5 5316 bytes
font_01_sfnt_off000078d7.bin
3cf14ce5f4bac551d443b5ea7cafcd1af63acbc1500cd5d01447f99f05ce5049		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D7 9980 bytes

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