Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaebb0ac3578a89a…

MALICIOUS

PDF

71.3 KB Created: 2020-08-08 16:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a757de789723c2c566d58c9ec8b3938 SHA-1: a88e61b673aae12918e4e398e31d40f99370fcb6 SHA-256: eaebb0ac3578a89a6e25e2d2e31e92541b35aefbc4439a801087aba191cca051
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to a URL that is disguised as a link to the 'Atomic Habits' book PDF. This URL is likely used to redirect users to a malicious site. The PDF also contains a PDF_SEO_LINK_FARM heuristic, indicating a large number of outbound links, many of which are benign Shopify links, but the primary malicious redirector is the most concerning. The ML classifier also flagged this PDF with high confidence.

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=james+clear+book+atomic+habits+pdf
    • http://files.oaklandchristianchurch.org/uploads/1/3/2/7/132711999/mosonajatogel_zotamarume_vegeragek.pdf
    • http://damasur.reynoldsdci.com/uploads/1/3/1/6/131636725/kipitune.pdf
    • http://files.muringavila.com/uploads/1/3/1/4/131453100/8018293.pdf
    • http://zunaduzi.mckaylascrystals.com/uploads/1/3/1/3/131398455/juzij.pdf
    • https://cdn.shopify.com/s/files/1/0433/3305/8715/files/adjective_worksheets_for_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/the_cestus_deception.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5349/files/13971610894.pdf
    • https://cdn.shopify.com/s/files/1/0435/4034/9082/files/law_firm_management.pdf
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/kumetidixerakilobexowek.pdf
    • https://cdn.shopify.com/s/files/1/0431/3248/5793/files/51776771462.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xizijifopaxefiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/28481842859.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/tale_of_three_kings.pdf
    • https://cdn.shopify.com/s/files/1/0429/7608/4117/files/6665831544.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/work_release_letter.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_off0000d97a.bin
25db2161c69bd175a544391a5cec5891dad0bf74000ad599794a172bbb2a0ec8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD97A 5588 bytes
font_01_sfnt_off0000ec4b.bin
836bd8e313cbb5424a6ed84f5e75fe38c52d5e270c6c56d46feb53faeb552403		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4B 10420 bytes

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