Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4125cc6c80f081a…

MALICIOUS

PDF

41.9 KB Created: 2020-08-10 05:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 071c6cddb59ccf19a208a8e1ef8d4d04 SHA-1: 0b4dbfa6a9201ea4ba640555895c17f655947002 SHA-256: d4125cc6c80f081a9a7ad880e7a485180e4ca6f2cbd38e811571d69bd8d8716d
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The heuristic firings indicate this PDF is part of a link farm, likely designed to manipulate search engine results or lead users to malicious sites. The ML classifier strongly supports the malicious nature of this document.

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=factors+of+digital+divide+in+south+africa+pdf
    • http://files.marker99.com/uploads/1/3/1/4/131406337/jogofasu.pdf
    • http://files.lighthousechurchathensny.net/uploads/1/3/0/8/130874284/87a65a6c32.pdf
    • http://files.imablumm.com/uploads/1/3/1/3/131383297/belaxaralux.pdf
    • http://files.countertopkings.com/uploads/1/3/2/6/132681308/6023668.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/25669568164.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/xiluzedegita.pdf
    • https://cdn.shopify.com/s/files/1/0434/0963/7533/files/bafomesewujuwudetorox.pdf
    • https://cdn.shopify.com/s/files/1/0428/7676/4327/files/regadolige.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/84617133736.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/lisalirinuduginelikomejop.pdf
    • https://cdn.shopify.com/s/files/1/0435/4726/3128/files/78857616417.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/93747596128.pdf
    • https://cdn.shopify.com/s/files/1/0436/1030/8765/files/zizozog.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/11003435720.pdf
    • https://cdn.shopify.com/s/files/1/0434/7199/5033/files/75740180974.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/bakomiderotef.pdf
    • https://cdn.shopify.com/s/files/1/0432/2240/1185/files/31717025539.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_off000065ca.bin
4c84324ad04f0e824c71e70ef9ece2b207a45e5ceca902520f294b71e219c4f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65CA 5432 bytes
font_01_sfnt_off00007848.bin
1baa5ec4e433b1859855af630fc57560f5713505d2bfce42aff5b92db570b603		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7848 10204 bytes

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