Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c43936a45e8b7c2…

MALICIOUS

PDF

34.0 KB Created: 2020-08-26 04:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab3b0fcba7ccff66ff6b191cc16d30e6 SHA-1: 33a0fc2b53f59322188c9b5e0001fcb43f4b7fc5 SHA-256: 4c43936a45e8b7c24a068b5ba4256a6c0b096c58063bdc60feefb4077d50b6f0
150 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the PDF is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious infrastructure.

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=masterbuilt+propane+turkey+fryer+manual
    • http://files.callegarihorses.com/uploads/1/3/0/7/130775229/9726656d.pdf
    • http://files.hawartawfiq.com/uploads/1/3/1/6/131636872/relogutevi_gexabozikiz_mikarenukokod_nurinef.pdf
    • http://files.ruraldesignco.net/uploads/1/3/1/6/131606046/6968348.pdf
    • http://vuxat.daypuck.com/uploads/1/3/0/8/130813965/8a94013a14.pdf
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/delenidotasuxajivulubu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0371/5481/files/saxarubewawox.pdf
    • https://cdn.shopify.com/s/files/1/0440/3098/4357/files/asurion_phone_claim_affidavit_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8992/files/center_parcs_elveden_forest_map.pdf
    • https://cdn.shopify.com/s/files/1/0438/1710/7616/files/40933762497.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9213/files/96029414345.pdf
    • https://cdn.shopify.com/s/files/1/0434/8595/4208/files/suwibogibajamisigideje.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/31409890128.pdf
    • https://cdn.shopify.com/s/files/1/0462/7261/0464/files/39978549183.pdf
    • https://cdn.shopify.com/s/files/1/0435/3599/0943/files/changes_black_sabbath_piano.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_off0000477b.bin
98f64124c2b45a3af2f5f2d6f47f786e26742865b8cec1acdf4bf4ba41eab95b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x477B 5360 bytes
font_01_sfnt_off000059a2.bin
c957598c833cd468a021e18d46fc4fe735aef091af0a69b9794326669ba0137d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A2 9796 bytes

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