Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee38349a2b07a06d…

MALICIOUS

PDF

41.1 KB Created: 2020-08-24 03:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b52922f1a27ddc972abcaab99b99910d SHA-1: 0045e154f0ca264d942ab0c69b928293103c0b8d SHA-256: ee38349a2b07a06d2048cdf66767f83352b54c1f4f2eb1ee1f49a49660d6f63b
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=demonstrative+pronoun+worksheets+for+grade+1+pdf'. The document body, though heavily obfuscated, contains this URL and other Shopify URLs, indicating a lure to potentially malicious content disguised as educational worksheets. The ML classifier strongly flagged this PDF as malicious.

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=demonstrative+pronoun+worksheets+for+grade+1+pdf
    • http://guvefap.ndsportschannel.com/uploads/1/3/1/3/131379478/wusogepesifefe-timevijatefa-tilijipozoki-xiwawaxariduki.pdf
    • http://files.amandasmusiclessons.com/uploads/1/3/1/6/131607600/zidibajawogewu-gatekinapefor-nidoweg-zuwirimamudakol.pdf
    • http://files.yourwshop.com/uploads/1/3/1/4/131437376/puzukono.pdf
    • http://borumap.viana-motion.com/uploads/1/3/2/6/132683138/livupurikub.pdf
    • https://cdn.shopify.com/s/files/1/0437/6159/8616/files/adobe_editor_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0432/8793/7179/files/rapapafejade.pdf
    • https://cdn.shopify.com/s/files/1/0437/0166/5960/files/pdf_split_and_merge_mac_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7745/9365/files/wuxopako.pdf
    • https://cdn.shopify.com/s/files/1/0460/0001/3479/files/zezitavax.pdf
    • https://cdn.shopify.com/s/files/1/0435/0646/6975/files/android_headphone_amp_app.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/kafanele.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/dependency_theory_andre_gunder_frank.pdf
    • https://cdn.shopify.com/s/files/1/0439/3625/2072/files/lord_of_the_flies_symbolism_essay.pdf
    • https://cdn.shopify.com/s/files/1/0437/5478/2869/files/24767190736.pdf
    • https://cdn.shopify.com/s/files/1/0431/2019/7789/files/thyroidectomy_steps.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/37790864166.pdf
    • https://cdn.shopify.com/s/files/1/0438/5207/1074/files/repemufof.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_off00006145.bin
386c9c582ce4079d2d1aedb75bea46d4640b8cab8b9512e146d4f771cf882689
pdf-font-stream PDF embedded font (sfnt) at offset 0x6145 5688 bytes
font_01_sfnt_off00007495.bin
8ad1ec704d6827917290770002cf4fc9ea73e052452ad2dd94f8279066254e79
pdf-font-stream PDF embedded font (sfnt) at offset 0x7495 10160 bytes