Malicious PDF — malware analysis report

Static analysis result for SHA-256 8494afea88da9313…

MALICIOUS

PDF

49.2 KB Created: 2020-08-03 22:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 373b3844add18b7e8a15b9b8827c3a09 SHA-1: 5a5d0d73a517e4065579f91bdb7602a6157f5f5b SHA-256: 8494afea88da931384fd4de750d922fb1832bbf713d3160e2135978c32e2571f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a strong indicator of malicious intent. The document body, though heavily obfuscated, contains text related to an 'Alibaba group annual report 2020 pdf' and a URL that appears to be part of a link farm designed to manipulate search engine results. The presence of these elements suggests a phishing or redirection attack.

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.com/pify?keyword=alibaba+group+annual+report+2020+pdf
    • http://files.midmichigansingers.com/uploads/1/3/1/8/131856398/6fc73661d516.pdf
    • http://files.liveopenly.net/uploads/1/3/0/7/130776142/timefigasalo_fefuriridijudew_sozerajiwi.pdf
    • http://files.angieskonacoffee.com/uploads/1/3/1/1/131164052/gufegivo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13879903487.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75901524911.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6899/files/bilisesokotusov.pdf
    • https://cdn.shopify.com/s/files/1/0438/1887/7090/files/jigofoxuzef.pdf
    • https://cdn.shopify.com/s/files/1/0437/0900/5978/files/70260180336.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/taratesepanivosu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2025/3344/files/39205871693.pdf
    • https://cdn.shopify.com/s/files/1/0434/8094/0710/files/john_deere_2040_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/37381253302.pdf
    • https://cdn.shopify.com/s/files/1/0431/8121/1810/files/ponobelupozuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/migapumegib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/babopegoxalavukaxometu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/73108908091.pdf
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/21070057402.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fd3.bin
bec7a064cc2c81fcac0d1e8215636bad7123218a3d477ecc4bd383e1462fe532		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD3 4688 bytes
font_01_sfnt_off00008034.bin
25307f7c227c1f6844e03ff255b66552d3d9ee89830ecade44f6fa8457610889		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8034 5436 bytes
font_02_sfnt_off000092bc.bin
fa78810f4687033b52ccc1c5fe2923ddb58663ecdf7730bc42bb7dcc1edfe2ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92BC 10684 bytes

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