Malicious PDF — malware analysis report

Static analysis result for SHA-256 7320a312b3b96966…

MALICIOUS

PDF

49.2 KB Created: 2020-08-22 11:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8615e6ec143cae0070eb420e72223117 SHA-1: 481216e0a7eec09c096c6ec65d2e6acc0be5efcf SHA-256: 7320a312b3b9696628f6829072527540625fcb38aee1fcacbe76a4f98a4d58e3
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=infographic+report+builder'. The document body, though heavily obfuscated, contains this URL and other links, suggesting a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector URL is a strong indicator of a phishing attack.

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=infographic+report+builder
    • http://files.totalbalanceclinic.co.uk/uploads/1/3/2/7/132712139/sonitujejexikeriz.pdf
    • http://files.umunano.org/uploads/1/3/0/7/130776714/tunananenomod_dedejozazabubeg_tegavi_xigasenudivuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/ielts_recent_actual_reading_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/fallout_3_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/sademitalugukeketaxisata.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1029/files/cambridge_checkpoint_past_papers_science.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2303/files/cepal_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0434/0200/2595/files/tejubejasupusomefoveb.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/carcinoma_basocelular_tratamento.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9619/files/iccid_check_android.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/acta_constitutiva_de_una_empresa_completa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6218/files/jejukogamubas.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/55974127181.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/linobutuvabuwixebiw.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_off0000744e.bin
20582ca1398df8928f7990cc145efc63517ba25eb32c3f85445c8554469ec47f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x744E 5196 bytes
font_01_sfnt_off000085e2.bin
b98dd22d5c96b33e75de92a83f2e4a0305b0eb87e06215f8d3437e1fd37342e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85E2 10524 bytes
font_02_sfnt_off0000a9d5.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9D5 4324 bytes

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