Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c0e18b63fc9a748…

MALICIOUS

PDF

45.8 KB Created: 2020-08-08 23:34:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b09a307261a6b223ff17bab6ae398d5b SHA-1: 240c7c39357fb3f5830b656ee0756a242658d2b2 SHA-256: 5c0e18b63fc9a7488082c317c7ea8f824ab9af1084dc9e2f737b206da721434d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains URLs that appear to be part of a link farm designed to distribute traffic. The primary malicious URL identified is https://ttraff.cc/pify?keyword=sailing+to+byzantium+symbolism+pdf, which likely serves as the initial point of compromise.

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=sailing+to+byzantium+symbolism+pdf
    • http://files.rachelannsaylor.com/uploads/1/3/1/4/131482832/6782605.pdf
    • http://gufagu.heartsofhorsehaven.org/uploads/1/3/1/4/131407227/5739309.pdf
    • http://files.alycewolfe.com/uploads/1/3/1/4/131408056/7b3a3fca900cdfa.pdf
    • http://files.gracebibleministries.com/uploads/1/3/1/3/131398224/4933051.pdf
    • http://files.reneeleaberger.com/uploads/1/3/0/8/130873943/5979147.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6259/9586/files/tekewuvixizobifazesimal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xomuburisuxenogiduta.pdf
    • https://cdn.shopify.com/s/files/1/0435/8252/1503/files/fobafinobagusoxovi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/jajalekunobogamudak.pdf
    • https://cdn.shopify.com/s/files/1/0434/5276/0224/files/nunelosoxefevupokage.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27984898694.pdf
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/pumazivipegosikafogifepub.pdf
    • https://cdn.shopify.com/s/files/1/0430/5171/2666/files/dopixulowuropimuwoju.pdf
    • https://cdn.shopify.com/s/files/1/0431/0168/3873/files/26803557300.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4604/files/72233031665.pdf
    • https://cdn.shopify.com/s/files/1/0438/6009/9222/files/kubuwoga.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/96993361067.pdf
    • https://cdn.shopify.com/s/files/1/0429/5032/8486/files/boursorama_protection.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067f6.bin
e8e6a8c6d022c4db32af626ef7b436fdeb87840d42fdb75fe3efe5c3a20cb768		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F6 5424 bytes
font_01_sfnt_off00007a49.bin
b06d24aa7cb4aa9994b968a064e08f15174de407f65cd24fba1802526cc58a8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A49 9676 bytes
font_02_sfnt_off00009b66.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B66 4324 bytes

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