Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf0f3be8e7af52b…

MALICIOUS

PDF

113.5 KB Created: 2020-08-09 08:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94cbf83cc5a05fe5bd148823994769df SHA-1: d0f58080e8291f2dece75fc2a4e7ebf11071c9a5 SHA-256: 6cf0f3be8e7af52b6c02408022de38012abaef757943f042263e40d339fff4ab
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body also contains this URL, suggesting an attempt to trick users into downloading further malicious content. The presence of numerous external PDF links further indicates a link farm or SEO poisoning attempt to distribute malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=filosofia+del+derecho+aristoteles+pdf
    • http://bafezesom.adamsonguardian.com/uploads/1/3/1/3/131380213/momowe.pdf
    • http://files.trevormlewis.com/uploads/1/3/1/6/131606128/88c5c9b.pdf
    • http://files.ipoggioli.com/uploads/1/3/1/3/131383541/595891a48b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/raquitismo_neonatal.pdf
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/goluwoligit.pdf
    • https://cdn.shopify.com/s/files/1/0429/4790/3654/files/54723055454.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/sarifapezos.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/12331768044.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/sedarumunuse.pdf
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/todow.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1777/files/python_read_first_line_of_file.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nejoxalivivurotuzepebibus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baludugosutagaxoreforodul.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000175bb.bin
0a330b7801491c3d040a540295bffe6752bf592247a64a91759c1ba49a354cc7
pdf-font-stream PDF embedded font (sfnt) at offset 0x175BB 5196 bytes
font_01_sfnt_off00018765.bin
561c66f68a338cbab1b55f0312cbd57a86a1c91db3db3858c3cbb5c6e02f06d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x18765 15772 bytes