Malicious PDF — malware analysis report

Static analysis result for SHA-256 258bc6fb5deb6d2f…

MALICIOUS

PDF

37.8 KB Created: 2020-08-27 15:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17940e4969b445361e7b59c03d49a6da SHA-1: e04b32c32d55dae862a059ff3c1e78630412751e SHA-256: 258bc6fb5deb6d2f74600a491c4b513f51d0e1fb5a3732e85be7044789e3348f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to 'Ezi wire windscreen removal' and includes the malicious URL, suggesting a lure for users to click. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, likely for SEO manipulation or to distribute the malicious payload across multiple domains. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=ezi+wire+windscreen+removal
    • http://xufudu.breadandchocolateland.com/uploads/1/3/1/4/131407552/xozoxaleludet.pdf
    • http://zosedida.claregriffin.org/uploads/1/3/1/4/131453060/pidoki.pdf
    • http://files.lanabiba.com/uploads/1/3/0/9/130969855/d04508c32a0b7.pdf
    • https://cdn.shopify.com/s/files/1/0432/5366/1864/files/42131855229.pdf
    • https://cdn.shopify.com/s/files/1/0432/9806/2501/files/85651763730.pdf
    • https://cdn.shopify.com/s/files/1/0431/2399/8874/files/28102339507.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5632/files/86077715005.pdf
    • https://cdn.shopify.com/s/files/1/0435/1007/1460/files/wametitiputakolizukowam.pdf
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/ps2_iso_games.pdf
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/jixasazopajekax.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/77921708083.pdf
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/23747289159.pdf
    • https://cdn.shopify.com/s/files/1/0463/0426/4354/files/ielts_speaking_recent_actual_test_suggested_answers.pdf
    • https://cdn.shopify.com/s/files/1/0466/3469/6869/files/ind_vs_bangladesh_today_match_pitch_report.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_off00004cd7.bin
55b1dcda784e877b2853535f2f78d8803227cc366cfc13063a61c1d1e1bfbd0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CD7 5244 bytes
font_01_sfnt_off00005ea0.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA0 1800 bytes
font_02_sfnt_off0000672e.bin
e1c8178ca93997df1c73a523cf9a29b476f30fa28414cf0786ea2f58582eb20b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x672E 10252 bytes

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