Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f467d57069af748…

MALICIOUS

PDF

41.5 KB Created: 2020-08-07 14:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03580e3e30ae7fefabf8f0b552e3321d SHA-1: 564e5a9eb59aa9ed6566e996417f574ae97204ec SHA-256: 4f467d57069af7481bf635df7b380def2d3d9c384a42301840740b930760d5cd
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=bituminous+mix+design+pdf`. This indicates the document is designed to redirect users to malicious infrastructure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or a method to obscure the final malicious destination. The ML classifier also 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.cc/pify?keyword=bituminous+mix+design+pdf
    • http://files.espiralmana.org/uploads/1/3/1/8/131857304/rekenum.pdf
    • http://files.landscapesplusbydave.com/uploads/1/3/1/4/131453198/7218055.pdf
    • http://files.zapmobileentertainment.com/uploads/1/3/0/7/130775346/fd4754.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/57873530277.pdf
    • https://cdn.shopify.com/s/files/1/0437/0812/1242/files/ridesanejavaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/5468/6630/files/dofus.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/branches_of_horticulture_and_its_definition.pdf
    • https://cdn.shopify.com/s/files/1/0440/0830/8886/files/zefofowejukububuliganeje.pdf
    • https://cdn.shopify.com/s/files/1/0440/0598/2366/files/15538748021.pdf
    • https://cdn.shopify.com/s/files/1/0431/6905/4886/files/94351044712.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4733/files/46378455364.pdf
    • https://cdn.shopify.com/s/files/1/0438/6701/3280/files/7_natural_wonders_of_the_world.pdf
    • https://cdn.shopify.com/s/files/1/0432/7328/9888/files/tratamento_cancer_de_pulmo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3570/files/pandas_dataframe_apply.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_off00006443.bin
4c9444ac7afcad899ac8091ce8b123c52ae3d4eb09e1674f1e717a9807a5ee26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6443 5140 bytes
font_01_sfnt_off000075c2.bin
adff9411b3975630d4feb313320bf0a4bd1f8cb4dd9069f6adfb38beefd52b3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C2 10492 bytes

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