Malicious PDF — malware analysis report

Static analysis result for SHA-256 003bd360bc737561…

MALICIOUS

PDF

45.8 KB Created: 2020-08-05 16:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7fe8f2c2ecd0c84cf5bacfd7df1818a SHA-1: 709732cd1bda10cdfe9da7e26268ecd32de37013 SHA-256: 003bd360bc7375614c8ba7a5559afbec0fec7a03ba135a8824e72e74aa3cf7ef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly indicated maliciousness. The document body, though corrupted, contains a URL that is also present in the list of embedded URLs, suggesting a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=encyclopedia+judaica+pdf+vol+2
    • http://files.rigsbybuilders.com/uploads/1/3/0/7/130738620/kiwoboxisi.pdf
    • http://files.paiwalla.org.au/uploads/1/3/1/4/131407704/a461d3b090799d.pdf
    • http://files.jugglingforjustice.org/uploads/1/3/1/4/131483440/d311f811bb407.pdf
    • http://files.drelraghy.com/uploads/1/3/1/6/131607163/4510965.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/keborepezege.pdf
    • https://cdn.shopify.com/s/files/1/0430/9381/9541/files/20545759028.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/raxomufumilokibipu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3813/files/deriresoseverofa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8917/files/39133039763.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/kosem.pdf
    • https://cdn.shopify.com/s/files/1/0433/4803/3689/files/20912504459.pdf
    • https://cdn.shopify.com/s/files/1/0428/7853/3799/files/81999510472.pdf
    • https://cdn.shopify.com/s/files/1/0436/9101/6347/files/30883876797.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/bissell_proheat_clearview_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5941/files/raspberry_pi_remote_gpio.pdf
    • https://cdn.shopify.com/s/files/1/0438/9027/8568/files/fasusuxenufepatubejo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3253/4440/files/ludavofanozerej.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007046.bin
7b12baea6a3409f6904ebd105f85d5fd25cd6b740436c7cedac264c7a05665d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7046 5204 bytes
font_01_sfnt_off00008236.bin
e61cddf846b47130ab861da42a22597d8c0e8c88201148f934d829eae20e2631		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8236 12224 bytes

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