Malicious PDF — malware analysis report

Static analysis result for SHA-256 5343b3931df0b19d…

MALICIOUS

PDF

52.7 KB Created: 2020-08-09 02:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81e7e4664d3b1b1091ef2e2e050fe603 SHA-1: 317dcc456e974c7aa85ca646ddef24154070b8e7 SHA-256: 5343b3931df0b19ddc269164133900caea65a1db9708e0940fd3b9f5dba2fe94
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate PDF downloads, but the primary link redirects to a known malicious redirector. This suggests a social engineering tactic to lure victims to malicious infrastructure. The document body contains obfuscated text and the URL `https://ttraff.com/pify?keyword=anesthesia+made+easy+pdf+download` is a clear indicator of a malicious redirector.

Heuristics 3

  • 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.
  • 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=anesthesia+made+easy+pdf+download
    • http://files.andrewmartinsmith.com/uploads/1/3/0/7/130738918/wikadukajiv.pdf
    • http://gigenok.ameliaformanphotographs.com/uploads/1/3/2/6/132695569/xosadotox_senizo.pdf
    • http://files.jazzetc.org/uploads/1/3/0/7/130739746/tuzuluxidubeworugoja.pdf
    • http://files.creekdebate.org/uploads/1/3/1/4/131483281/mujapidegexijer_nixirux_rapabesogez.pdf
    • http://xinupelom.danburyonfire.com/uploads/1/3/0/7/130775219/somosilaw_mazixe_zupozunugadigeb_soxojelupob.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/52826414442.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/27202888447.pdf
    • https://cdn.shopify.com/s/files/1/0433/9499/0243/files/21510805500.pdf
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/55283963628.pdf
    • https://cdn.shopify.com/s/files/1/0436/6866/8569/files/descargar_libro_de_cero_a_uno.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/80543044885.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1542/files/sufokefevalevokagagixuwu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57148414383.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/equal_employment_opportunity_definition.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/71522775722.pdf
    • https://cdn.shopify.com/s/files/1/0429/7709/9935/files/58430083455.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_off00009068.bin
accf9d753a9531b23721dba6d1c9e19e9d6ffb32a555f2c995db957eb0d35c06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9068 5368 bytes
font_01_sfnt_off0000a2a4.bin
9fabed160ebb0caa4bff5055a37e96e6eae6823642ec57c48168c52b56922792		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A4 10416 bytes

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