Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce6919afe967a31…

MALICIOUS

PDF

41.9 KB Created: 2020-08-09 10:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b58e194afbacb9f3701358b1609c7f93 SHA-1: d8d409abbfe39d61431a1a241a6a2ab4f9e99235 SHA-256: 2ce6919afe967a31e33fa0629d0221fd71b16ce300f7fae845a73b4d4946be76
150 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=asian+food+recipes+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, suggesting a lure to a malicious site. The ML classifier strongly supports the malicious nature of this PDF.

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=asian+food+recipes+pdf
    • http://jirelito.thechaletsymondsyat.com/uploads/1/3/2/6/132681352/1199085.pdf
    • http://files.morroandjasp.com/uploads/1/3/0/9/130969375/wojerodijudo.pdf
    • http://wepove.riverglennkennels.com/uploads/1/3/1/4/131453215/xifevemonuzef.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/tixufuwilonifemidofusir.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/25176280467.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/joliwukid.pdf
    • https://cdn.shopify.com/s/files/1/0431/3029/0327/files/tigidowigoxojozatitufu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/53839151169.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/lodovolasedip.pdf
    • https://cdn.shopify.com/s/files/1/0437/8601/0776/files/kapujakesevesiwonutija.pdf
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/nomokizawubevemiwerupim.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/86675744846.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexanenivoxepabulolud.pdf
    • https://cdn.shopify.com/s/files/1/0433/3725/3023/files/sceptre_tv_codes.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/lukekijubajutezilub.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7433/files/wetotixebifotuvoxox.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_off00006621.bin
f66056c290f57caae672fe9c753848d57fa3855fc94a19f8216aabad92ae463e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6621 5104 bytes
font_01_sfnt_off00007793.bin
f8286a416c2c951aa492d79a54e51a4ca9bfa66daabef2509022b279a9a3c00b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7793 10352 bytes

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