Malicious PDF — malware analysis report

Static analysis result for SHA-256 37462ef84dc521a7…

MALICIOUS

PDF

43.1 KB Created: 2020-08-22 19:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a78589798ccc9159398ae4ee45d89705 SHA-1: f7c4068424889808504205f779050fe32b63e694 SHA-256: 37462ef84dc521a7f824a35ac996578b76263a320d8ee613a0b0a95252afcb2f
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, many of which point to Shopify domains, but one critical link redirects to a known malicious URL (ttraff.cc). The document body, though heavily obfuscated, contains text related to a baptism study and the malicious URL, suggesting a lure. The heuristic firings confirm the presence of malicious redirector links and a link farm within the PDF.

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=estudio+del+bautismo+en+agua+pdf
    • http://files.palimpsys.com/uploads/1/3/0/7/130738720/c57db1.pdf
    • http://files.ourcrazyratadventure.com/uploads/1/3/1/6/131606280/f0a14.pdf
    • http://pogefow.aspireinsurancegroup.com/uploads/1/3/0/7/130776131/bokuxake-detubuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wekisod.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1607/files/waveposa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8772/files/bujofozibixaxodagulod.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/new_uc_browser_free_apps.pdf
    • https://cdn.shopify.com/s/files/1/0429/1428/3686/files/saxon_algebra_1_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0440/0542/5310/files/5987981802.pdf
    • https://cdn.shopify.com/s/files/1/0433/9639/9269/files/tipo_de_articulacion_de_la_rodilla.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/wafebemumojodoxagavukovob.pdf
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/sujet_brevet_franais_amrique_du_nord_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/5407/1957/files/dexikuzetobimixuxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/gajoxokekibawanexabuto.pdf
    • https://cdn.shopify.com/s/files/1/0465/5844/5718/files/munulotefibukufazalumewi.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_off00006740.bin
c72910fc9a1179f3b5d5ff958de8c4a01730a6278b2f0e2f6268c1b9809e5634		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6740 5360 bytes
font_01_sfnt_off0000796c.bin
de1c3fc6cc40c9793c431e28e77965b8a60b820638915ceefb5b3bbae3191944		 pdf-font-stream PDF embedded font (sfnt) at offset 0x796C 11400 bytes

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