Malicious PDF — malware analysis report

Static analysis result for SHA-256 25c51f2ca28db7f9…

MALICIOUS

PDF

39.4 KB Created: 2020-08-26 21:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 002776d6eb6e5210cab30056c6ea1345 SHA-1: 64b4ea648ad688199f37fc4149a077caf99a7c34 SHA-256: 25c51f2ca28db7f975e42032c32f693104633f85e95b785937d11a4caac5def4
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.link/pify?keyword=critical+hit+deck+5e'. Additionally, it features a PDF link farm with numerous external links, many hosted on Shopify, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The ML classifier strongly supports the malicious nature of this 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.link/pify?keyword=critical+hit+deck+5e
    • http://lepeporo.urbanedenbeauty.co.uk/uploads/1/3/1/4/131413418/5711969.pdf
    • http://vovakuj.smashingolive.com/uploads/1/3/1/0/131070581/gupezepakad.pdf
    • http://files.bayjedesigns.com/uploads/1/3/1/3/131379833/zexirokimipu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6522/files/catia_v6_full_version_free.pdf
    • https://cdn.shopify.com/s/files/1/0462/4318/4794/files/volebi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9168/0673/files/bokenobinonixekafezudawe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/53517792840.pdf
    • https://cdn.shopify.com/s/files/1/0447/8697/4869/files/alcohol_y_metabolismo_humano.pdf
    • https://cdn.shopify.com/s/files/1/0432/8482/4222/files/fanobigikesigixetafado.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/kevijapuzub.pdf
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/molecular_thermodynamics_mcquarrie.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/gotalesolor.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3804/files/valmiki_ramayanam_ayodhya_kanda_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0460/2927/5295/files/lukumabotamovire.pdf
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/8699605213.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3406/files/garazabemaku.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_off00005851.bin
8763d184843ab466b1d9d53402be35eb80586b35100973ca35a9183f55a3222f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5851 4940 bytes
font_01_sfnt_off0000690d.bin
db54408345f1d1e99647c6006ac8f0fb962262f4703d3ccbd8fd4f7c2959f430		 pdf-font-stream PDF embedded font (sfnt) at offset 0x690D 12412 bytes

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