Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a3ebed2995e397…

MALICIOUS

PDF

38.4 KB Created: 2020-08-11 00:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a92833c001549dcf8bbdea7685dbfb1f SHA-1: b8bc0764a3b17fa9d73f273706661555daee44ad SHA-256: 67a3ebed2995e39791357ec8e172926c7a6721d0ec060ae6a7d467d62a9f1266
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'world atlas map book pdf free download' and the malicious URL, suggesting a lure for users seeking free content. The ML classifier strongly indicates maliciousness, and the presence of a redirector link supports a phishing or scam attempt.

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=world+atlas+map+book+pdf+free+download
    • http://files.tilliesschoolofperformingarts.com/uploads/1/3/2/8/132814476/3610933.pdf
    • http://files.erinmdesign.com/uploads/1/3/1/6/131606719/tomuvof_wenajanazurenot_movuse.pdf
    • http://files.shopmwcoastalgoods.com/uploads/1/3/1/3/131383630/rigadoxigeviwozezol.pdf
    • http://jujobibo.marissabadgley.com/uploads/1/3/1/3/131384424/zasorisajakir_pudifidiw_zimemo_jiwafovotoraw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9282/8579/files/lalebijaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/adobe_illustrator_cracked.pdf
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/corporations_act_full.pdf
    • https://cdn.shopify.com/s/files/1/0437/4147/9066/files/33294348325.pdf
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/3289942185.pdf
    • https://cdn.shopify.com/s/files/1/0436/4340/4441/files/sesebuvonasokujififupab.pdf
    • https://cdn.shopify.com/s/files/1/0432/5172/8546/files/balutavutozovibuxarivuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavoriduxosijalas.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6554/files/84346284649.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28851780814.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/bupuxufukorexopinaga.pdf
    • https://cdn.shopify.com/s/files/1/0430/5453/0714/files/biwezovudubi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005534.bin
95bec78161f3dd17dfcb180d8e0959ace5105d7b3b4720628e7dddcf0695fc55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5534 5496 bytes
font_01_sfnt_off000067ec.bin
32fd10e4d6e65af331736f0e4d64d628c7bfa1a0197520a91cb4055a69e7b643		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67EC 10364 bytes

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