Malicious PDF — malware analysis report

Static analysis result for SHA-256 8915b34265d1fb67…

MALICIOUS

PDF

37.7 KB Created: 2020-08-02 13:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01b7167904e25e4a2017296fdf7a7e2e SHA-1: b485b2466dbc6fdd87f820ec4248b056f0e65031 SHA-256: 8915b34265d1fb67b71cc9579f7c72407e414ba5281119f4961d04e73dc159a0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a mass external link farm, with many links pointing to PDF files hosted on Shopify. One of the primary links, https://ttraff.ru/pify?keyword=cheap+trick+mighty+wings, is identified as a known malicious redirector. This suggests the document is designed to lure users to malicious infrastructure, likely for further exploitation or phishing.

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.ru/pify?keyword=cheap+trick+mighty+wings
    • http://files.howtofindworknow.org/uploads/1/3/1/0/131070918/4adc5eaff1.pdf
    • http://files.annabarnhart.com/uploads/1/3/2/6/132681660/e1e0567a.pdf
    • http://files.thegreenlightconsultants.com/uploads/1/3/0/7/130775732/zumenopokufemol-bazofap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6701/5322/files/6689324597.pdf
    • https://cdn.shopify.com/s/files/1/0435/6866/0643/files/84361957912.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1185/files/lebiwomegoxozebirero.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/wetajefatiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/83315881156.pdf
    • https://cdn.shopify.com/s/files/1/0428/7204/5734/files/bioshock_achievement_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/8955/1770/files/51160180178.pdf
    • https://cdn.shopify.com/s/files/1/0431/7347/8560/files/84633525633.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89186344985.pdf
    • https://cdn.shopify.com/s/files/1/0432/1945/2063/files/48974120359.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_off000054a1.bin
147959766575cb13bb81abf8a89d9cb348e4ca300b54ac841828ae4f6cac2e07
pdf-font-stream PDF embedded font (sfnt) at offset 0x54A1 5480 bytes
font_01_sfnt_off00006732.bin
f108d7cfc157bf26fa401eca23b40dc723ef4e37e8fa7d56222787d24611991f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6732 10248 bytes