Malicious PDF — malware analysis report

Static analysis result for SHA-256 116877fa96458d34…

MALICIOUS

PDF

41.9 KB Created: 2020-08-12 03:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc4e317150f63a20e91c7e5ddb7d4ede SHA-1: 6b3e0a49b18cd3cb783ccfc9497fc9f83b9126ea SHA-256: 116877fa96458d34d94314849f28c2b73113c60d12f1f520a88c15d45a848cb4
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to external PDF files, and one critical link to a known malicious redirector. The document body, though partially corrupted, contains text related to a vaccination card and includes the malicious URL, suggesting a phishing or malware distribution lure. The presence of numerous links to other PDFs indicates a link farm, likely used to improve SEO for malicious content or to distribute further payloads.

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.cc/pify?keyword=carteira+de+vacina%25C3%25A7%25C3%25A3o+animal+pdf
    • http://files.maindeleternel.org/uploads/1/3/2/7/132712011/toruxuja.pdf
    • http://files.syrcemusic.com/uploads/1/3/1/3/131378771/zedewo.pdf
    • http://xapevaxaj.duojonssoncoudroy.com/uploads/1/3/1/6/131637016/pagesabes.pdf
    • http://xodizeb.losangeleszetas.org/uploads/1/3/0/7/130739017/5659637.pdf
    • http://tefowapol.shootitrawphotography.com/uploads/1/3/1/4/131438008/lugijadeso-wiwarufuxoxipel-fogusoduxo-roxolibop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7129/7943/files/40284644378.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/lenuwerijofoxakusokexa.pdf
    • https://cdn.shopify.com/s/files/1/0439/3140/2395/files/l_islam_politique.pdf
    • https://cdn.shopify.com/s/files/1/0434/2425/2055/files/99476481575.pdf
    • https://cdn.shopify.com/s/files/1/0429/7241/4106/files/wewetelalexemogoxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2423/6199/files/60592424749.pdf
    • https://cdn.shopify.com/s/files/1/0433/5370/2550/files/81135599809.pdf
    • https://cdn.shopify.com/s/files/1/0428/9232/9116/files/ruvefogi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/98583406310.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/airport_express_setup_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6564/files/99639072767.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000802a.bin
52c9adcca337f49898927ccc1d058a0d959a80d690cbc3b991a60681df79fa66		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x802A 16888 bytes
font_00_sfnt_off00004ac8.bin
1a5191cb0056d04840095104d6b5f32244c805f1c16a4a7c03e97310027e9d05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC8 5588 bytes
font_01_sfnt_off00005ce3.bin
49c7f4d78eead66432b44dceb4e61e1cdd468220975a4a5dc8a36eb014b3f656		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE3 11324 bytes

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