Malicious PDF — malware analysis report

Static analysis result for SHA-256 578d619c43ea752e…

MALICIOUS

PDF

39.1 KB Created: 2020-08-04 15:34:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b3ff344e844555280ad91421a5af92a SHA-1: 70b29f5241a812782217cb18ec1e378b3a994e4d SHA-256: 578d619c43ea752e948d40cf9f62c35fb092ab996827d861b1582639a020483c
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains associated with SEO link farms. One critical heuristic identified a link to a known malicious redirector infrastructure at https://ttraff.ru/pify. The document body, though heavily obfuscated, contains this URL and other links, suggesting a lure to external malicious content. No scripts were extracted from this sample.

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.ru/pify?keyword=rubrik+penilaian+writing+descriptive+text+pdf
    • http://nanijibax.gfwctennessee.com/uploads/1/3/2/6/132696414/d1d1259a4dd.pdf
    • http://files.colquittcountysaddleclub.org/uploads/1/3/0/8/130814043/jubunoditezif.pdf
    • http://files.wellnessthroughadventure.com/uploads/1/3/2/8/132814306/sogexewetevek.pdf
    • http://files.wordslikestars.com/uploads/1/3/0/8/130813841/nuputomoj.pdf
    • http://files.literacygatewayinstitute.com/uploads/1/3/1/4/131409200/36ccce.pdf
    • https://cdn.shopify.com/s/files/1/0428/9937/4233/files/fugupupipunarog.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0815/files/false_ceiling_designs_for_hall_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/nesek.pdf
    • https://cdn.shopify.com/s/files/1/0434/2897/0647/files/understanding_and_using_english_grammar_5th_edition_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8392/files/changing_firefox_font_size.pdf
    • https://cdn.shopify.com/s/files/1/0438/3614/5814/files/55700968619.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/84419118522.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6918/files/28664527993.pdf
    • https://cdn.shopify.com/s/files/1/0437/3748/1365/files/bipikenagulapatisafa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/nojovef.pdf
    • https://cdn.shopify.com/s/files/1/0437/2057/3082/files/sakarenemipurelinig.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/bogufegigug.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2944/files/14098432296.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_off0000591f.bin
dfac97d09ea382587f2d0677823c72ce5c1aee7c69f31513bff8c8bf87788e95
pdf-font-stream PDF embedded font (sfnt) at offset 0x591F 5756 bytes
font_01_sfnt_off00006ce8.bin
8067bb811174ebd4f98ec14bc2a2a9b15623cd2b02f89e548f65e26293cc5bad
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE8 10104 bytes