Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e248705a69bf60…

MALICIOUS

PDF

40.7 KB Created: 2020-08-26 18:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5472d32affd7837de39e372cfe7c71c6 SHA-1: a81b149eab7b615e186eb196a717d84094ce3514 SHA-256: 68e248705a69bf60a91e88be00fcc92ac92d9cf722b6b2cd22972035e314e36d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'sword art online episode 18 summary' and the malicious URL, suggesting a lure to a content-scraping or phishing site. The presence of a large number of external PDF links further indicates a link farm or SEO poisoning attempt.

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=sword+art+online+episode+18+summary
    • http://nimog.jeremyboros.com/uploads/1/3/0/8/130813765/lefofa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1829/6216/files/1443610896.pdf
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/firunefo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6074/6647/files/10993246667.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1407/files/idioma_kaqchikel.pdf
    • https://cdn.shopify.com/s/files/1/0429/6530/3455/files/pobamanib.pdf
    • https://cdn.shopify.com/s/files/1/0429/8014/7359/files/70115381420.pdf
    • https://cdn.shopify.com/s/files/1/0435/4542/8120/files/bobarinegegajijolakinur.pdf
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/jejojeguxanapokedanotu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/xugulusenafatinux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/78633108736.pdf
    • https://cdn.shopify.com/s/files/1/0438/0141/1744/files/saving_private_ryan_script.pdf
    • https://cdn.shopify.com/s/files/1/0440/1269/9798/files/guardian_chinese_novel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/answer_sorry_for_the_inconvenience.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_off00006038.bin
f4d708c71c54b224540e290d12465bcab5232a22a135beae540f96d14b1e2c1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6038 5648 bytes
font_01_sfnt_off0000736f.bin
82eacf78b698a2004ed821048266536ed7bdaa661b315177c1dd18e0e52a6f69
pdf-font-stream PDF embedded font (sfnt) at offset 0x736F 10072 bytes