Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f30abf3f8029180…

MALICIOUS

PDF

49.8 KB Created: 2020-08-27 17:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae24fb491e347b1a324a2faf9fcc9892 SHA-1: d4bea532edc9208e6da9f41585d873e2104b520c SHA-256: 0f30abf3f80291805a5fd94032419dcf27ebf263512d0ce464c959226b171ecf
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that appears to be part of the link farm, suggesting a phishing or content manipulation scheme.

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=curso+eventos+a+distancia
    • http://levaf.definitivearts.net/uploads/1/3/2/6/132680981/fezujijuziwaxuz-jidajepisarira-fawij-xowitamenako.pdf
    • http://files.davemcdermand.com/uploads/1/3/0/7/130739522/9328834.pdf
    • http://sifufepof.mahakaitreasures.com/uploads/1/3/1/3/131381241/vakozekurame_mukale_kafam_libuwasi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/7309/3288/files/74198503972.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3671/files/muwukojopavisivi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/fikogowafuzulikeperuwosud.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/bawejulagekowiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1136/6309/files/49532168540.pdf
    • https://cdn.shopify.com/s/files/1/0430/8864/2197/files/29777583152.pdf
    • https://cdn.shopify.com/s/files/1/0433/9823/4270/files/91712941118.pdf
    • https://cdn.shopify.com/s/files/1/0432/0188/8416/files/jepinimubafagotewezed.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/wugerun.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/30104598229.pdf
    • https://cdn.shopify.com/s/files/1/0459/9840/7837/files/siden.pdf
    • https://cdn.shopify.com/s/files/1/0437/1893/4677/files/ranger_beastmaster_5e_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4329/files/triforce_build_gloomhaven.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_off00007320.bin
e69fa53fc880ae011f2828cf4c6c41fbe635f272fd4c4054e7e1ecf44ff51406		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7320 4864 bytes
font_01_sfnt_off000083bc.bin
08800275058edd0cccaa691683be69ff0662cafb056bbab85d3bbd9314c09eb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83BC 12268 bytes
font_02_sfnt_off0000aaa2.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAA2 4324 bytes

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