Malicious PDF — malware analysis report

Static analysis result for SHA-256 c930208c2162d968…

MALICIOUS

PDF

41.3 KB Created: 2020-08-03 16:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a922cdb1dacda1f8eecb2528f1f54337 SHA-1: a940a875fc8ff3c32986515c299a2ca110f968eb SHA-256: c930208c2162d96807889b4156aa88254a9e23c8575215bf5fec27e497ede517
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate research documents, but the primary link redirects to a known malicious infrastructure. The document body, though heavily obfuscated, contains the URL that is flagged as a malicious redirector. This suggests the PDF is a lure to drive traffic to malicious sites, likely for further exploitation or phishing.

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=thyroid+dysfunction+in+pregnancy+pdf
    • http://files.ncexchangeclub.com/uploads/1/3/1/1/131164046/c2917.pdf
    • http://files.merrittathletics.com/uploads/1/3/1/1/131164440/7795015.pdf
    • http://files.executive-advocate.com/uploads/1/3/1/3/131379406/kowisi_gulatapagupitol_pifuzunefowoz_fagamiz.pdf
    • http://files.stfoafrisco.org/uploads/1/3/0/7/130739713/2616085.pdf
    • http://files.hoaks4wheeldrive.com/uploads/1/3/0/7/130740056/pavirise-kazafor-zogogodivun-jetugipibofutev.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/febowakumanaseb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bobidaxida.pdf
    • https://cdn.shopify.com/s/files/1/0432/2151/6449/files/48141117687.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/64849674400.pdf
    • https://cdn.shopify.com/s/files/1/0434/5787/2038/files/20366445563.pdf
    • https://cdn.shopify.com/s/files/1/0440/8537/9237/files/vizasodidevatolodufeveb.pdf
    • https://cdn.shopify.com/s/files/1/0434/7818/8198/files/85014159865.pdf
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/viropixujarizibukeguvujub.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/satovosegivijefesinuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/0380/5847/files/89818252018.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_off00006251.bin
cb9f3a9579cfe5d2a254ecf6036472b0822e807ac9cc62804dc3f254f14f95ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6251 5436 bytes
font_01_sfnt_off000074d3.bin
47d5bd1fd909996d9594f5c75e7c85c8f370e3bcb32e0e3070bcc5c95df26a14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D3 10396 bytes

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