Malicious PDF — malware analysis report

Static analysis result for SHA-256 054af907be4338e8…

MALICIOUS

PDF

64.8 KB Created: 2020-08-08 17:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b244c0c5be0adcfeab260164f482060c SHA-1: b063314c647c78304621886387309d6b71f77d12 SHA-256: 054af907be4338e8b8079193cc84873a2b646f58beb5171c81b6e6d92a35b569
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=arc+length+of+a+curve+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to drive traffic to malicious infrastructure. The presence of many external PDF links further indicates a link farm or redirection scheme.

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.ru/pify?keyword=arc+length+of+a+curve+pdf
    • http://files.atomicallure.org/uploads/1/3/0/7/130776755/senituza.pdf
    • http://files.adentanewzealand.com/uploads/1/3/2/6/132695994/gevuvato_goxame_rubivotagugod.pdf
    • http://files.daytoncommunitynews.com/uploads/1/3/0/7/130739740/tobojagodeluga.pdf
    • http://files.lakeodessaarts.com/uploads/1/3/2/6/132680890/joxosaroj-zefedilawuxubo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0061/7381/files/30856908742.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5671/files/90187158017.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/sunabafupetegotamo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/eris_bot_for_discord.pdf
    • https://cdn.shopify.com/s/files/1/0432/6188/6627/files/dudadajen.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/54760594071.pdf
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/75572039383.pdf
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/20884770552.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/html_to_javascript_jsfiddle.pdf
    • https://cdn.shopify.com/s/files/1/0437/6775/8997/files/wg111_v3_drivers.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b79.bin
36530245bb31c8c9d9b9d04275b3e8a8e100ac19070952a86932e870e40e6428		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B79 5288 bytes
font_01_sfnt_off0000ad7b.bin
4b8f66e019f03cde3fffb1d7bd70e06ac4393c763097898348caf33e65d665c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD7B 15916 bytes
font_02_sfnt_off0000e01c.bin
bdadc4561523584fb9e3a13844729a80f2e161e379d0f8ab05f523544257575c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE01C 16360 bytes

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