Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea52338b28c9a2be…

MALICIOUS

PDF

44.3 KB Created: 2020-08-11 00:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9c81286d235485d621e806dcf15ca73 SHA-1: 5f49b9ce3353b1273c12602387ecd9860d611bab SHA-256: ea52338b28c9a2be3255e4258fdb74672f6c50b3d0723c3d617af675e57debea
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.com'. The document body, though heavily obfuscated, contains the same lure text and URLs as found in the heuristics. This indicates the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

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=subject+verb+agreement+exercises+pdf+grade+6
    • http://files.makinghairsmile.com/uploads/1/3/1/3/131380213/sutevolipi_powaka_tepepanuguvixof_vufaf.pdf
    • http://files.douglasback2schoolblitz.com/uploads/1/3/1/4/131483020/xivaj.pdf
    • http://files.jazziebella.com/uploads/1/3/2/6/132681482/gajatonumigop.pdf
    • http://files.nchomeremodel.com/uploads/1/3/0/8/130874042/togijigeboxupev_sobuzo_tirinebeja_mazawe.pdf
    • http://files.boiseveteransdayparade.org/uploads/1/3/1/0/131069781/1522185.pdf
    • https://cdn.shopify.com/s/files/1/0438/1753/3597/files/delete_blank_page_preview.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/109980943.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/86247813290.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3531/files/ccitt_compression.pdf
    • https://cdn.shopify.com/s/files/1/0434/1956/6231/files/sistema_renina_angiotensina_aldosterona_resumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9612/1251/files/81244808053.pdf
    • https://cdn.shopify.com/s/files/1/0435/0181/3915/files/rujiwomoze.pdf
    • https://cdn.shopify.com/s/files/1/0430/8228/5216/files/65777674556.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fezusagofetivori.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/napekuxizakogaraz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/10505128835.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/87355578116.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c5d.bin
d1d152b2fee2f9f16d978bae67be0ac6db9bddeecb30acd45a58e1b81f051dab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5D 6044 bytes
font_01_sfnt_off000080e5.bin
28c5cd965ca4cb924e51f17d2c1858618dc9061cc90e08bdca7b06f026328d48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80E5 10208 bytes

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