Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b3815103190e9a…

MALICIOUS

PDF

47.8 KB Created: 2020-08-12 07:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03071f9bf1505164a4aa433769f6523b SHA-1: b94c3f0adc005fca335f95d45f0a08da1a8471dc SHA-256: d3b3815103190e9ad0f085dcd39b4fefcd5f1ddd7ee5eba39c60e0c5ab2882a4
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded external links, suggesting a link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=ateismo+definicion+pdf, which is likely used to redirect users to a malicious site. The document body contains garbled text but also includes the same malicious URL and several benign-looking Shopify URLs, indicating a lure to disguise the malicious intent.

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=ateismo+definicion+pdf
    • http://dagus.stephanielamprea.com/uploads/1/3/0/9/130969060/4586927.pdf
    • http://nadewem.timrowlandbooks.com/uploads/1/3/1/8/131856772/9cc56a45.pdf
    • http://norexe.anintentionalheart.com/uploads/1/3/0/7/130738848/8499358.pdf
    • http://lorid.lavishcoatings.com/uploads/1/3/1/4/131452954/jizaragodujet_todevow_maderorakatejon.pdf
    • https://cdn.shopify.com/s/files/1/0430/9096/8729/files/fifif.pdf
    • https://cdn.shopify.com/s/files/1/0437/7015/1061/files/92074268465.pdf
    • https://cdn.shopify.com/s/files/1/0437/0703/9897/files/42506040888.pdf
    • https://cdn.shopify.com/s/files/1/0437/3712/0933/files/nixezabolulenujawef.pdf
    • https://cdn.shopify.com/s/files/1/0437/8034/1917/files/rs_agarwal_aptitude_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/2794/5889/files/43604189260.pdf
    • https://cdn.shopify.com/s/files/1/0435/0168/2843/files/28646777668.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/womosoravitixugefiwil.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/73496105030.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/ssc_stenographer_syllabus_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/4684647017.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_off00007c92.bin
888cf727a6e5ff8bb43602ada917d997251f28e0957825a90587ea48658bb752		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C92 4952 bytes
font_01_sfnt_off00008d61.bin
85d9f638d5b601cda884d1278a0a1e040a235b1b63e0764b611e0155ca0e8510		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D61 10944 bytes

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