Malicious PDF — malware analysis report

Static analysis result for SHA-256 418e4b209ceee82e…

MALICIOUS

PDF

39.5 KB Created: 2020-08-12 00:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b41b65fc5e1019d40de9d82dcb613ed9 SHA-1: d0ff6e744b684817931056a2c7b9d45a151bacaa SHA-256: 418e4b209ceee82e96b5139d0c63b2eb4bdbd12ac0d0fa376c89e7869998be09
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF documents, a technique often used for SEO poisoning or to distribute malicious content. One of these links, 'https://ttraff.ru/pify?keyword=avoid+plastic+in+tamil+pdf', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness.

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=avoid+plastic+in+tamil+pdf
    • http://vonif.massrealestatewholesalers.com/uploads/1/3/0/7/130775934/jipoka-limajisagul-xuwuvarokogeku.pdf
    • http://files.bodybrainexercise.com/uploads/1/3/1/3/131398097/fomuw-fuvonixudegetal-pumuduxev-lezekizewuzo.pdf
    • http://files.dyslexiaadvocacyactiongroup.org/uploads/1/3/2/6/132681517/4221132.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/digajiriranazogomuxezomis.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9652/files/lojexekuxupud.pdf
    • https://cdn.shopify.com/s/files/1/0434/8765/8150/files/78197278536.pdf
    • https://cdn.shopify.com/s/files/1/0433/7231/4778/files/sujojekapowemuzugajulo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/principles_of_bed_making_in_nursing.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/limofixujuvuxufa.pdf
    • https://cdn.shopify.com/s/files/1/0437/9253/1617/files/torrent_vikings_season_3.pdf
    • https://cdn.shopify.com/s/files/1/0433/3358/2998/files/11749419960.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7345/files/agronomic_biofortification.pdf
    • https://cdn.shopify.com/s/files/1/0433/9390/8892/files/katizurararorifuzas.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0727/files/core_java_interview_questions_and_answers_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72707516801.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_off00005509.bin
6aa6cc32d2e18ccfa7a416011e8ea8770b83d53ebb0d5dae9733ab690d888b26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5509 5252 bytes
font_01_sfnt_off000066df.bin
d149706f6702538f1dda4f7ba5c29f94de541f95e8a8dac48bf891270bf2f385		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66DF 13864 bytes

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