Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f378da304f3fa0…

MALICIOUS

PDF

39.3 KB Created: 2020-08-17 02:09:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1deb86cc6ead04ee03ca19b9b3fc47b1 SHA-1: ca47da6a093f95c288afe8e0e86d36e60d3ae6f3 SHA-256: 15f378da304f3fa0344646149d21a0dce34f036613ba47033e39d3a64ab65003
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at `https://ttraff.ru/pify?keyword=ultrasonic+ranging+module+hc+sr04+datasheet`. The document body, though heavily obfuscated, contains this URL and other links to PDF files hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of 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=ultrasonic+ranging+module+hc+sr04+datasheet
    • http://files.threeaineconsultancy.com/uploads/1/3/1/0/131070125/587526f65.pdf
    • http://files.learningdifferencesresourcegroup.com/uploads/1/3/2/7/132740445/wodisemunisipo.pdf
    • http://files.hinterlandceramics.com/uploads/1/3/1/4/131437174/gefitonigoj-latizumi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5555/4455/files/23661849228.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/takuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/2944/7335/files/lixawuxitef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rowogumidakedodovejizana.pdf
    • https://cdn.shopify.com/s/files/1/0428/6329/6678/files/68425202858.pdf
    • https://cdn.shopify.com/s/files/1/0432/6519/6197/files/moresizeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6349/files/mabuwaxa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3001/9237/files/landline_rainbow_rowell_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/xisuzovupujekej.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9271/files/90675696247.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56325204281.pdf
    • https://cdn.shopify.com/s/files/1/0435/7731/1391/files/still_i_rise_poem_analysis_line_by_line.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6285/files/dimel.pdf
    • https://cdn.shopify.com/s/files/1/0434/0062/6325/files/biology_reference_books_for_class_9.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_off00005a9d.bin
2e37af276e94d4485883158a076ec9e495d6ef26ef95e17ba5f1d3ef606d783d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A9D 5572 bytes
font_01_sfnt_off00006d58.bin
5383288307e364e5276521497ab0859ca21e95c16f717d8d66bea3050ffeab70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D58 10184 bytes

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