Malicious PDF — malware analysis report

Static analysis result for SHA-256 a21ee4d4a902201f…

MALICIOUS

PDF

41.1 KB Created: 2020-08-09 11:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33c2fce628847526307a2d11b904332e SHA-1: 22c7df9f4ee84b14b9c6c07ba5f5b539c419bc5d SHA-256: a21ee4d4a902201f4b98294be5683dfa795e670bf69af5456220e0ca622dfd02
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one pointing to a known malicious redirector infrastructure (ttraff.com). The ML classifier also strongly indicated maliciousness. The document body and embedded links suggest a lure to download further malicious content or phish for information, likely related to the 'sermons about the holy spirit pdf' keyword. The presence of multiple Shopify URLs, some benign and some unknown, indicates a potential attempt to blend malicious links with legitimate ones.

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=sermons+about+the+holy+spirit+pdf
    • http://files.trottereventcenter-ord.com/uploads/1/3/1/6/131606727/32894c153901.pdf
    • http://pukuta.neckprosperity.org/uploads/1/3/2/3/132302780/diwizes_dapagiwunifad_redivajavuba.pdf
    • http://files.bad-for-your-health.com/uploads/1/3/0/9/130969469/mupudirexuferetux.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/33395248552.pdf
    • https://cdn.shopify.com/s/files/1/0434/9558/8005/files/5533951588.pdf
    • https://cdn.shopify.com/s/files/1/0431/2737/3986/files/fozenudozotatowutoru.pdf
    • https://cdn.shopify.com/s/files/1/0440/6575/1192/files/lumizeral.pdf
    • https://cdn.shopify.com/s/files/1/0430/6334/5301/files/22525667474.pdf
    • https://cdn.shopify.com/s/files/1/0438/6009/9222/files/9412647659.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/zutozigorojefijidukuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/77228196106.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7901/files/pdf_del_libro_cazadores_de_microbios.pdf
    • https://cdn.shopify.com/s/files/1/0437/4046/3255/files/bodmas_worksheets_for_grade_6.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/adobe_flash_cs3_download.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000548c.bin
a98b121a37044929f90cf01b4d30f002eae75c288effa499d76d1b1a90e56e19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x548C 5508 bytes
font_01_sfnt_off00006708.bin
3c00bbfa73ab463cb8492037ce89c3aa8db604c81d463d3e24fb21134538dca6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6708 10048 bytes
font_02_sfnt_off00008966.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8966 4324 bytes

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