Malicious PDF — malware analysis report

Static analysis result for SHA-256 039fca78c50cb66c…

MALICIOUS

PDF

40.2 KB Created: 2020-08-20 21:11:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 496a13c14df9dc8817b22f035b91695e SHA-1: c26cdc2e0c332c83ec4d9331916bfdc481e84bda SHA-256: 039fca78c50cb66ced2c85190d2fe92d759c2a73c2047e25b36a7bc29f53aafa
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links pointing to Shopify-hosted PDF files, indicating a link farm or content distribution strategy. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=oce+league+of+legends', is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users or manipulate search results, potentially leading to malicious content or phishing attempts.

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=oce+league+of+legends
    • http://vegoti.baltimorefrassati.org/uploads/1/3/1/3/131379578/2551560.pdf
    • http://nixus.deirdresinsights.com/uploads/1/3/1/6/131606289/7653827.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/91386539889.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32600433864.pdf
    • https://cdn.shopify.com/s/files/1/0432/3436/1508/files/ave_maria_bach_piano.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0209/files/vexuruzam.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/80249599082.pdf
    • https://cdn.shopify.com/s/files/1/0434/1324/2005/files/46364353849.pdf
    • https://cdn.shopify.com/s/files/1/0461/7663/2986/files/dukoxafanowugodireware.pdf
    • https://cdn.shopify.com/s/files/1/0433/2231/0811/files/95945593148.pdf
    • https://cdn.shopify.com/s/files/1/0447/0997/0076/files/politikal_na_pakikilahok.pdf
    • https://cdn.shopify.com/s/files/1/0440/6879/8614/files/sizojawekinubaso.pdf
    • https://cdn.shopify.com/s/files/1/0433/4570/7162/files/rapixabozeguvekapinorefut.pdf
    • https://cdn.shopify.com/s/files/1/0434/3467/2285/files/dowuxow.pdf
    • https://cdn.shopify.com/s/files/1/0448/4985/6669/files/website_scraping_with_python_using_beautifulsoup_and_scrapy.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_off0000585e.bin
a5e8fa70aa28c2b63b739d270ff508bd0d697bc740490a155e4098480d0c21ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x585E 5120 bytes
font_01_sfnt_off000069e0.bin
2a751346055aff248de5cc615fa17432f4899a19a92a0c1403866500de1caf4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E0 13632 bytes

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