Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29a2dc98745fef8…

MALICIOUS

PDF

42.8 KB Created: 2020-08-21 11:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b581172f78ef6a1dcd7976d1a6b7cc0c SHA-1: dd3b4c0a1469c441b5d5c049ebcabe741cb71c2e SHA-256: a29a2dc98745fef85233410e7f5596315a2d86686495627329be807b1678e2fe
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, contains text related to unit conversion and references the malicious URL, suggesting a lure. The ML classifier and heuristic firings strongly indicate malicious intent, likely to redirect users to phishing or malware hosting sites.

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=mm+to+micron+conversion+chart+pdf
    • http://files.manuelapilzart.com/uploads/1/3/2/7/132740547/tedefikotapinib.pdf
    • http://letos.leilasabet.com/uploads/1/3/2/3/132303382/zoxabaw.pdf
    • http://files.travellingpen.com/uploads/1/3/1/0/131070307/xefoxo_totojegilizog_lapuzonuruzux_tawor.pdf
    • http://rokudux.glensfallsleah.org/uploads/1/3/0/7/130738684/sofaluviwajelezukul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muxajuvorupi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5792/files/descubre_1_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0440/6371/9574/files/punta_rassa_tides.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/xavataganejabiwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0594/3701/files/graphing_systems_of_equations_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7868/8674/files/affinity_photo_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7709/9935/files/bowopomagapopij.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/mukuganeguvurajoxu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0108/4064/files/temporale_prpositionen_bungen_b1.pdf
    • https://cdn.shopify.com/s/files/1/0439/0181/2904/files/kindle_model_d01400.pdf
    • https://cdn.shopify.com/s/files/1/0430/3775/3493/files/ponofavudupubirenesase.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_off00005d5f.bin
06ab3901801186b299ffc5a216b16bec3c531fbfa00f81bcb4f3ffd0afd67479		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5F 5428 bytes
font_01_sfnt_off00006fb3.bin
a8b42135381819abba3f6f290868307b140bc79f655c6109086d3fff33bc8f7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB3 14148 bytes

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