Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47b13d9b6c64352…

MALICIOUS

PDF

48.3 KB Created: 2020-08-09 01:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba9ba3ae37a9265f072721bb5f82b1da SHA-1: 1e9341e3c3d368458bb22348aab1f37e0916128c SHA-256: f47b13d9b6c643524cb1bead776f9413b2bef2f55aac8f2dc74a0ae22e92247f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, https://ttraff.com/pify?keyword=kuensel+calendar+2020+pdf+download, is used to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to this malicious URL and a benign-looking PDF, suggesting a lure to download a file that ultimately leads to malicious infrastructure. The presence of many Shopify links suggests an attempt to blend in with legitimate content.

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=kuensel+calendar+2020+pdf+download
    • http://files.maschmeyer.com/uploads/1/3/1/3/131378838/putedogovo-piretelaso-bonuwezi.pdf
    • http://files.bikeforlifesd.org/uploads/1/3/2/6/132682802/peguko-safewarosamesu-kafivilozobo.pdf
    • http://files.dukeunccls.com/uploads/1/3/1/4/131483371/6017493.pdf
    • http://piside.monaghantidytowns.com/uploads/1/3/0/7/130738531/rawokurev.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/70008834781.pdf
    • https://cdn.shopify.com/s/files/1/0433/0776/1819/files/2323625901.pdf
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/36473860227.pdf
    • https://cdn.shopify.com/s/files/1/0434/5413/6473/files/how_to_anonymize_adobes.pdf
    • https://cdn.shopify.com/s/files/1/0435/5611/0487/files/86286446900.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92702877098.pdf
    • https://cdn.shopify.com/s/files/1/0444/4350/0710/files/31065591976.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/81231932075.pdf
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/vikobujuxexedetip.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/free_form_filler_software.pdf
    • https://cdn.shopify.com/s/files/1/0429/4619/9711/files/46951687578.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/37304835182.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bf4.bin
bc78286fbb1432c4ee71cb1132b0d7fad659802321d1fffbabcca85935da3b73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF4 5484 bytes
font_01_sfnt_off00006ecb.bin
05f002fbe2dafaf9ff3a91415ac4de6fc5120697e93b7d77852534f9b64c6f9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECB 11116 bytes
font_02_sfnt_off000086e2.bin
c14a7261fc73024d8eb5a71744047bba87e284d88f493d6fd64b95d3292805af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86E2 2448 bytes
font_03_sfnt_off0000918d.bin
65ce7be32060f512d926dfe51596a587878b372b456ba5961b7472b095354218		 pdf-font-stream PDF embedded font (sfnt) at offset 0x918D 9880 bytes

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