Malicious PDF — malware analysis report

Static analysis result for SHA-256 704be28e7b974ff1…

MALICIOUS

PDF

51.7 KB Created: 2020-07-31 12:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85268c3b18f8a03784b490fc24a15524 SHA-1: ad22cc1cacca49e56584430af214599a5897a3f2 SHA-256: 704be28e7b974ff11a34b1e4761a3d3d532e64bf676b9e4a8452f9336c794676
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector. The document body, though heavily obfuscated, suggests a lure related to 'Cervical screening test guidelines pdf' to entice users to click the malicious links. The presence of numerous external PDF links further indicates a link farm, likely for SEO manipulation or distributing further malicious content.

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=cervical+screening+test+guidelines+pdf
    • http://files.bitemephotos.com/uploads/1/3/0/8/130814459/5aa35b80d33149.pdf
    • http://files.terracepipesanddrums.ca/uploads/1/3/0/9/130969984/piwefifegetote.pdf
    • http://files.sussexeyecenter.com/uploads/1/3/2/7/132740445/ff0ce374cba13.pdf
    • http://files.cccaabbrefs.com/uploads/1/3/0/7/130740256/8886256.pdf
    • http://files.didsburyjuniors.com/uploads/1/3/2/6/132681824/maxipupamekep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4085/8527/files/59905834248.pdf
    • https://cdn.shopify.com/s/files/1/0432/0883/5236/files/26431248924.pdf
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/38224774053.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/sufopuwupuwusutep.pdf
    • https://cdn.shopify.com/s/files/1/0434/2749/6087/files/46282845211.pdf
    • https://cdn.shopify.com/s/files/1/0437/2565/2136/files/vuligabezegogemewob.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1460/files/juparek.pdf
    • https://cdn.shopify.com/s/files/1/0434/9778/3458/files/82228601710.pdf
    • https://cdn.shopify.com/s/files/1/0434/1510/9794/files/basakuzunekox.pdf
    • https://cdn.shopify.com/s/files/1/0431/1760/9122/files/30480490133.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_off00008d2d.bin
8051ae657a784d35f3530252eacca98cdba583bc7b5dbe8f4c18fed0bec979f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2D 5180 bytes
font_01_sfnt_off00009ee0.bin
87397022b7a075f7e8f506123ad277c3570928920c22853a5084dae5c6dc4761
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EE0 10132 bytes