Malicious PDF — malware analysis report

Static analysis result for SHA-256 68bed42d16f9babb…

MALICIOUS

PDF

104.0 KB Created: 2020-08-09 09:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 189b7bc4c5c761b6bec96eb8a19a1e62 SHA-1: 3527f827ec24106a11e98dada591f5ee7adc8fb7 SHA-256: 68bed42d16f9babb722c8ef56768792f9466d5d743224944ac54642f6bca4019
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body also contains this URL, suggesting an attempt to direct users to a potentially malicious site. The presence of numerous other PDF links further supports a link farm or phishing 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.com/pify?keyword=viagem+cecilia+meireles+pdf
    • http://files.ashliebailey.info/uploads/1/3/0/8/130874162/2a14e.pdf
    • http://files.allsaintsappleton.org/uploads/1/3/1/3/131398139/didejaj-kuxiwedarevisik-pajulelo.pdf
    • http://kavupugaw.ttpa.us/uploads/1/3/0/7/130775379/2d7e9f894d90c.pdf
    • http://files.aksushiya.com/uploads/1/3/1/4/131437775/diwupobi.pdf
    • http://files.alis-volat-propriis.com/uploads/1/3/1/6/131636766/zamadufifisit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3382/9277/files/15126888142.pdf
    • https://cdn.shopify.com/s/files/1/0433/4161/1159/files/72611466256.pdf
    • https://cdn.shopify.com/s/files/1/0432/8076/0990/files/kezepimaliz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/siwesuwenekinu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6244/files/kinderzuschlag_anlage_kind.pdf
    • https://cdn.shopify.com/s/files/1/0438/2998/5430/files/beatles_in_my_life_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/57895515038.pdf
    • https://cdn.shopify.com/s/files/1/0433/9479/3630/files/99464550903.pdf
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/70285020737.pdf
    • https://cdn.shopify.com/s/files/1/0438/8788/6488/files/mopoduwojegimulegoxune.pdf
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/wijunobosukumuvuxedatepe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/babexumisajedojates.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/castoriadis_libros.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013888.bin
623877948b93f8aed3e28edea0a75d39dcdc1c2049e746f32002e236da1d4542		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13888 5440 bytes
font_01_sfnt_off00014afa.bin
6353e99fe4a662edb0cf3e9f27e44070c6c5474a2f8e0b03d59757977cdbf463		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14AFA 16184 bytes
font_02_sfnt_off00017ce9.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17CE9 16204 bytes

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