Malicious PDF — malware analysis report

Static analysis result for SHA-256 155544745642eff6…

MALICIOUS

PDF

39.1 KB Created: 2020-08-17 14:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a82cc935139bbf360e798662398a94d1 SHA-1: bca6b10a9ffe1cb8b2308c8d25665a0e66e8213b SHA-256: 155544745642eff6801d3080669ea92f0f1402a40b02095d8badf6865f76c678
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body text suggests a lure related to combining Excel tables, likely to entice users to click the embedded links. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=combine+multiple+excel+tables+into+one+sheet
    • http://files.lembixlab.net/uploads/1/3/0/7/130739686/3978710.pdf
    • http://files.soundboundhealing.com/uploads/1/3/1/4/131438616/c1c734.pdf
    • http://banaw.nayansfiji.com/uploads/1/3/2/6/132695535/7925463.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0667/3574/files/togatirab.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/66191770857.pdf
    • https://cdn.shopify.com/s/files/1/0434/3404/9703/files/bandura_personality_theory.pdf
    • https://cdn.shopify.com/s/files/1/0434/0652/4566/files/94191707639.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/25982031000.pdf
    • https://cdn.shopify.com/s/files/1/0435/9792/2461/files/zopifamed.pdf
    • https://cdn.shopify.com/s/files/1/0430/5453/0709/files/64132212617.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/38685271998.pdf
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/python_bind_function.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8246/files/26646609777.pdf
    • https://cdn.shopify.com/s/files/1/0433/9387/6118/files/cam_ron_pink_fur.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_off00005beb.bin
12ff91b23d14f3cdc5074623df5633cfeb90bdff093266b40c8d61a342521ea4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEB 5192 bytes
font_01_sfnt_off00006d67.bin
b4fe97cd8c19428ce0c24bf85f763c1265bb107f530a56a1687c5a858890bd2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D67 9932 bytes