Malicious PDF — malware analysis report

Static analysis result for SHA-256 e655a236a6d1b776…

MALICIOUS

PDF

44.9 KB Created: 2020-08-25 05:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 457310c33ee9fbeb0803a1722232544a SHA-1: ba78c3cf7c19483a5243c014801a59f6c1c25d42 SHA-256: e655a236a6d1b776e272d6f45ab1d98a3c8102df029093aa205dbe7f9fe6ce2a
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the string 'The backwards law pdf' and the malicious URL. The presence of a PDF link farm heuristic further supports the malicious intent of redirecting users to external, potentially harmful, content. No scripts were extracted from this sample.

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.com/pify?keyword=the+backwards+law+pdf
    • http://nugida.kendallgrundyfb.com/uploads/1/3/1/3/131383483/4300484.pdf
    • http://rijelasug.charlescdixon.com/uploads/1/3/1/0/131070993/51390a83ab.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3126/files/19252126245.pdf
    • https://cdn.shopify.com/s/files/1/0428/5415/4406/files/52056841474.pdf
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/cement_based_tile_adhesive_formulation.pdf
    • https://cdn.shopify.com/s/files/1/0433/9472/8103/files/47761939884.pdf
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/18799477750.pdf
    • https://cdn.shopify.com/s/files/1/0432/6260/7518/files/56194425424.pdf
    • https://cdn.shopify.com/s/files/1/0436/1243/8685/files/dugivobifekaseti.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15125842299.pdf
    • https://cdn.shopify.com/s/files/1/0429/6700/7386/files/wurixonatefonoxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2648/9249/files/2597779946.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000655d.bin
6596d3a2e6c6aa9e695f391c3ca6c3de958a3d964c0602f9424499513d8f1052		 pdf-font-stream PDF embedded font (sfnt) at offset 0x655D 4932 bytes
font_01_sfnt_off0000763b.bin
c371d72baa103ad6fbf9a74904ecff9e0c361cdac99fb36ce6d4eed2467b0d07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x763B 10272 bytes
font_02_sfnt_off00009936.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9936 4324 bytes

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