Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6e25d74c3fad0e…

MALICIOUS

PDF

57.6 KB Created: 2020-08-21 05:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bdc342ffc294340496a0c44e8c2bc88 SHA-1: 756394d810ce52dd667273c4102ec232ce814730 SHA-256: 0a6e25d74c3fad0ef73ea4f3adc09d3ce77bac37473d234c61603f625a433a1a
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.ru'. The document body, though heavily obfuscated, contains a reference to the same URL, suggesting an attempt to disguise malicious content as a guide. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic, likely to obscure 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.ru/pify?keyword=ff14+sirensong+sea+guide
    • http://files.sarahdemedeiros.com/uploads/1/3/2/6/132681767/jogulowugokatebokat.pdf
    • http://suxovaso.shout4joy.net/uploads/1/3/1/4/131406799/danax-kimudubizopog.pdf
    • http://files.traceyourancestors.net/uploads/1/3/2/7/132710671/zubezovufafamepezek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8085/1364/files/31159449973.pdf
    • https://cdn.shopify.com/s/files/1/0436/2492/3298/files/pdf_to_word_document_converter_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/2873/3352/files/bristol_street_art_map.pdf
    • https://cdn.shopify.com/s/files/1/0436/5189/1358/files/best_ecommerce_html5_templates.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/bidagepobigubotatub.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/fatenavovofibebifegosu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0999/0043/files/sites_like_kissanime.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/surorut.pdf
    • https://cdn.shopify.com/s/files/1/0457/7247/2486/files/jusulufipev.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_off00009bfa.bin
9591e3c1d4ec0e617025eadc5297949e6efcdc16178c8c58b9373a72456c36e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BFA 5140 bytes
font_01_sfnt_off0000ad89.bin
8d044fb8513c5b5312bdb17f35f1b4b0e8cf3b81c7bc1d60ec28e61fe2aac230
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD89 14252 bytes