Malicious PDF — malware analysis report

Static analysis result for SHA-256 869c754f37e0fca5…

MALICIOUS

PDF

39.2 KB Created: 2020-08-09 06:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b42455e40438fb4e83b2825f28265a2 SHA-1: c42aa1bb52e8173ea2d28c007e0cf9b623b913cd SHA-256: 869c754f37e0fca52db468965b52bb95b34d89ddf09fd0da045fec9d99d3949b
170 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'aircraft maintenance manual a320 pdf' and includes the malicious URL, indicating a lure. The presence of numerous external PDF links, many pointing to benign Shopify domains, suggests a link farm SEO tactic to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=aircraft+maintenance+manual+a320+pdf
    • http://toliv.andrewkellyfilms.com/uploads/1/3/1/6/131637016/tedofabuzakuperigage.pdf
    • http://nesoxi.hillviewdartmouth.co.uk/uploads/1/3/2/8/132814930/giwotavekakukonase.pdf
    • http://files.briankinkadeportfolio.com/uploads/1/3/1/4/131437094/vugusuduto.pdf
    • http://files.jimmybeanscoffee.com/uploads/1/3/0/8/130874162/732429.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7260/1756/files/wosubokobufe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/nutimefonumewilu.pdf
    • https://cdn.shopify.com/s/files/1/0439/6512/0670/files/14420705163.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70277109097.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/sunetej.pdf
    • https://cdn.shopify.com/s/files/1/0429/9446/6969/files/ucas_personal_statement.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/keurig_2._0_k300_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/92720318805.pdf
    • https://cdn.shopify.com/s/files/1/0433/8994/3975/files/amerikanische_revolution_zusammenfassung.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/html_input_disable_autocomplete.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_off00005953.bin
d2af826358de7d03048247953d5717d73f3a898551535d888128f0b3113b4612		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5953 5548 bytes
font_01_sfnt_off00006c23.bin
c4ec8866d998bc95cc73705ce9ced5afa3ac8253360ee12c9cdbb4346a33a8e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C23 10560 bytes

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