Malicious PDF — malware analysis report

Static analysis result for SHA-256 767216eff86ab407…

MALICIOUS

PDF

45.6 KB Created: 2020-08-11 14:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 025e09420642db1df6c314fcd9d2f6da SHA-1: 769707d4cbeb04b5726f43633d11a5f4aee3392d SHA-256: 767216eff86ab407ce705cddc22f89a56dd3910b4140ba79bac56b1cfa0d238e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=angelus+novus+pdf'. While the document body is heavily obfuscated, the presence of numerous links, including to a known malicious redirector, strongly suggests an attempt to direct users to malicious content or phishing sites. No scripts were extracted, limiting the analysis of direct execution vectors.

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=angelus+novus+pdf
    • http://nedigi.theguarantee.org/uploads/1/3/1/8/131856772/7a919db8475ec6a.pdf
    • http://files.nancymontoyareports.com/uploads/1/3/1/4/131453206/nejaxujukevasukusoba.pdf
    • http://files.ronellesart.com/uploads/1/3/0/8/130815026/lelodoratarutukijolu.pdf
    • http://files.studythebibleyourself.com/uploads/1/3/2/8/132815220/tenamapofozisuv_vujadibixape_zonamewema.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6499/1637/files/pizakulanadexexivu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7801/6406/files/wasuxor.pdf
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/aasm_scoring_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/0469/6472/files/limewire_for_mc.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51982080438.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4601/files/talorot.pdf
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/38539494215.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/86211910370.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/dinogefow.pdf
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/ielts_sample_reading_test.pdf
    • https://cdn.shopify.com/s/files/1/0435/8668/3037/files/11584968464.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0679/files/ritivivono.pdf
    • https://cdn.shopify.com/s/files/1/0441/0572/8152/files/how_to_live_on_24_hours_a_day_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/7336/2325/files/94513203655.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006817.bin
2a1308cbab7c3180ebd0c18c701a8052fd3561f56ba9656596f911db62531767		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6817 4708 bytes
font_01_sfnt_off00007830.bin
a0e41ab39f1e80aea4a689330ee892507a6b5592dcc0e59974beb00a8dfbab1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7830 10480 bytes
font_02_sfnt_off00009b8e.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B8E 4324 bytes

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