Malicious PDF — malware analysis report

Static analysis result for SHA-256 7054fe5a6a270429…

MALICIOUS

PDF

98.2 KB Created: 2020-08-03 07:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c610dbd5c6daf56a7d1ca55f05e654b1 SHA-1: 1af3e904c4bb2c3f520aced4bb461464358508a4 SHA-256: 7054fe5a6a270429c127d1e5aa33b91b7a4361047bf36e4eb67d0a5c9448a449
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text referencing 'Bleach season 4 episode 1' and a URL that appears to be a lure. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector is likely spearphishing, with the document acting as an attachment designed to trick the user into clicking the malicious link.

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=bleach+season+4+episode+1
    • http://files.leebaxterdavis.com/uploads/1/3/0/8/130815017/nitevumaromuzotuw.pdf
    • http://files.furnaceproject.org/uploads/1/3/1/4/131409693/lodazeruxazaj.pdf
    • http://files.alternativewildlifesolutions.com/uploads/1/3/0/9/130969631/5608290.pdf
    • http://files.cabotkennels.com/uploads/1/3/1/3/131383478/f1f61f0ac769cd.pdf
    • http://files.leaannlewis.net/uploads/1/3/1/6/131637136/darunodovalon-ninutipuj-xipawimadibo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/5171/8558/files/51619510493.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/kedanepopa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/49285038456.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9652/files/32518735011.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/kitekuxebipugepawejovim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wajafaliwufenosikem.pdf
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/34797339176.pdf
    • https://cdn.shopify.com/s/files/1/0433/9538/3446/files/toyota_corolla_2010_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/dugomope.pdf
    • https://cdn.shopify.com/s/files/1/0431/1213/6855/files/36943538537.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65105912314.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/gabebelutavo.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_off0000a222.bin
e55ac40e19cf6ac20a4509a4a1fe3f3958c23fddd5cc078c68c711b9bd511fd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA222 54228 bytes
font_01_sfnt_off00014716.bin
b25da0f84b4de88bdbfcfcc662dffc956c87fb5e7e42d95c7bd7b820cb6be57e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14716 5252 bytes
font_02_sfnt_off000158f8.bin
5b1f50eccae46b22352322ae4de740b4e83646c4e9f2f0dffc6ca6f40e1cd7b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158F8 10028 bytes

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