Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e37f3345f6b8b8…

MALICIOUS

PDF

43.6 KB Created: 2020-08-14 18:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af16b4909093a565b4f09a17100740da SHA-1: 3c6e3fccfdc673e537454d8fa9b95cc60fb56611 SHA-256: 78e37f3345f6b8b8207e39195a8bd7ea79aac6b16715361696c0fa2cfe6e87e6
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO spamming operation. One prominent URL, https://ttraff.com/pify?keyword=new+movies++free+2018+bollywood, is flagged as a malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains similar URLs, reinforcing the malicious intent.

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=new+movies++free+2018+bollywood
    • http://files.minerstreettavern.com/uploads/1/3/2/7/132710762/pepaxuziladox.pdf
    • http://files.2ndfontanaapostolicchurch.com/uploads/1/3/1/6/131637194/9900644.pdf
    • http://files.ubawa.org/uploads/1/3/0/8/130814831/7175146.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/19740840945.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65545430121.pdf
    • https://cdn.shopify.com/s/files/1/0431/1882/1530/files/ielts_band_score_7.pdf
    • https://cdn.shopify.com/s/files/1/0431/8576/6561/files/38888170325.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22650439267.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72707516801.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0969/files/67931654254.pdf
    • https://cdn.shopify.com/s/files/1/0438/9784/7976/files/computer_laboratory_rules_and_regulations.pdf
    • https://cdn.shopify.com/s/files/1/0433/0831/8878/files/71004249015.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/sesowumolunodokuvipono.pdf
    • https://cdn.shopify.com/s/files/1/0440/0558/9157/files/pdf_to_word_converter_online_candy.pdf
    • https://cdn.shopify.com/s/files/1/0440/1407/6069/files/65179972272.pdf
    • https://cdn.shopify.com/s/files/1/0435/6594/0904/files/dogoxux.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/kuzedubipip.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_off00006b4f.bin
d3f016fa0a50f8f3138fb80a62d8565db9500390aae310b1ef73c58aaf5e6ac3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4F 5728 bytes
font_01_sfnt_off00007edb.bin
1fab0672ad91697d2201e1853d56c7c85da0f8478199a1ea087ae53ed45ed902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDB 10212 bytes

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