Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf59fe24d5c5fe95…

MALICIOUS

PDF

38.6 KB Created: 2020-08-22 00:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa8f0128a459dfec36d05d72c6147d0a SHA-1: b4d7bcf6ef5febd06b493c953cc86dbd42f95cec SHA-256: cf59fe24d5c5fe95ea8653be316a430ae1eaef779e64b82ae71b77b351861d8c
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body appears to be malformed or obfuscated, but the presence of numerous external links, including one to a malicious redirector, suggests a malicious intent, likely related to SEO manipulation or hosting further malicious content.

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.ru/pify?keyword=boondocks+season+4+episode+9
    • http://files.pachamamanativeart.com/uploads/1/3/1/3/131380308/fufixubux.pdf
    • http://vidaku.enhanceosteopathy.com.au/uploads/1/3/1/6/131606289/sovatiwaraniz_pujufunug_felirojibiwe.pdf
    • http://bubita.askeaton.coralleisure.ie/uploads/1/3/0/7/130739061/767608.pdf
    • http://fixun.165aircadets.org/uploads/1/3/1/6/131606289/6e644a2.pdf
    • http://files.yorkscribes.co.uk/uploads/1/3/1/4/131453111/fatugu_woseve_rejenulafiwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9439/2485/files/tizibovijotujon.pdf
    • https://cdn.shopify.com/s/files/1/0435/8511/0177/files/java_1._6_0_64_bit_filehippo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/vojujejizozesurumo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1185/0918/files/48933729229.pdf
    • https://cdn.shopify.com/s/files/1/0430/3706/5370/files/90575196417.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/shankar_ias_environment_and_ecology_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/86157326341.pdf
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/vanadirabonazaxafikula.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/biwajotatufi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5790/4792/files/cisco_ise_1._3_patch.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_off00005a1f.bin
4dfc07f41f6b4e343ed08d8d55ac0da41faeb1dd4c9d9126b9aa31f9924b24aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1F 5296 bytes
font_01_sfnt_off00006c3c.bin
78c6b8d1fbe75696f4d93e225b8caf31eb9ed0f8a3e0fdcdc1c10ed7aa62e4c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3C 9740 bytes

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