Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed3f785bfa08888…

MALICIOUS

PDF

59.4 KB Created: 2020-08-20 02:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1effb32783c792de3b5905afef23bee SHA-1: 90ae8fad6c6d256b895a85b8c84c5c43a35cba46 SHA-256: bed3f785bfa088886d9aaecafc330f482bfc6858df90ad6ed1e62d08c97dbcd3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with a critical heuristic firing for a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=bleach+brave+souls+apk+and+data'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to download potentially malicious content. The ML classifier also strongly indicated maliciousness.

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=bleach+brave+souls+apk+and+data
    • http://files.juliettebergmanngrandprix.com/uploads/1/3/1/6/131606953/5604135.pdf
    • http://files.mingsgardenwillowglen.com/uploads/1/3/1/4/131437711/aba560894ec8b20.pdf
    • http://files.jesmicjewelry.com/uploads/1/3/0/9/130969984/posobogegukidodef.pdf
    • http://files.howardcountyschoolhealthcouncil.org/uploads/1/3/0/7/130775607/jabefuvizoximul-lureduluko-jipolun-dowovajanale.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/81248307481.pdf
    • https://cdn.shopify.com/s/files/1/0437/6238/5045/files/interview_questions_on_javascript_and_jquery.pdf
    • https://cdn.shopify.com/s/files/1/0434/5528/3367/files/artikel_akuntansi_biaya.pdf
    • https://cdn.shopify.com/s/files/1/0435/9458/0136/files/9630496495.pdf
    • https://cdn.shopify.com/s/files/1/0428/0074/2567/files/rikuragolitiripufazorut.pdf
    • https://cdn.shopify.com/s/files/1/0433/2204/8667/files/jemefejagipaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8920/files/72725602830.pdf
    • https://cdn.shopify.com/s/files/1/0435/8357/0083/files/download_brown_skin_girl_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/61786037147.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/66222904970.pdf
    • https://cdn.shopify.com/s/files/1/0437/6032/0669/files/70400346650.pdf
    • https://cdn.shopify.com/s/files/1/0432/3108/4701/files/wisivizebiluwejudunog.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/rainierland_mayo_movie.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_off00008e72.bin
7afbfc6d01d9ba6b45e1522b700e2932853f1a2655c9851dfb32a5e7ab4e1ada		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E72 3112 bytes
font_01_sfnt_off000099af.bin
9fc23b84d00e2a1eaa767338dc0e12a481ac6551fb06c63508ac24a974c0de35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99AF 5472 bytes
font_02_sfnt_off0000ac40.bin
e615b655a84632f8f2d9bf5ad89d7b190c89dc20a3640aa8c511c027f30dbf47		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC40 16844 bytes

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